diff --git a/cern-root-loader/src/commonMain/kotlin/ru/mipt/npm/root/DObject.kt b/cern-root-loader/src/commonMain/kotlin/ru/mipt/npm/root/DObject.kt
new file mode 100644
index 00000000..361e0ae2
--- /dev/null
+++ b/cern-root-loader/src/commonMain/kotlin/ru/mipt/npm/root/DObject.kt
@@ -0,0 +1,160 @@
+package ru.mipt.npm.root
+
+import kotlinx.serialization.json.Json
+import space.kscience.dataforge.meta.*
+import space.kscience.dataforge.misc.Named
+import space.kscience.dataforge.names.Name
+import space.kscience.dataforge.names.asName
+import space.kscience.dataforge.values.doubleArray
+import kotlin.properties.ReadOnlyProperty
+
+public fun MetaProvider.doubleArray(
+    vararg default: Double,
+    key: Name? = null,
+): ReadOnlyProperty<Any?, DoubleArray> = value(key) {
+    it?.doubleArray ?: doubleArrayOf(*default)
+}
+
+
+public class DObjectCache(private val cache: List<Meta>, public val refStack: List<Int> = emptyList()) {
+    public operator fun get(index: Int): Meta = cache[index]
+
+    public fun stack(ref: Int): DObjectCache = DObjectCache(cache, refStack + ref)
+
+    public companion object {
+        public val empty: DObjectCache = DObjectCache(emptyList(), emptyList())
+    }
+}
+//
+//public interface ObjectRef<T : DObject> {
+//    public fun resolve(): T?
+//}
+
+//public class ChildObjectRef<T : DObject>(
+//    public val builder: (Meta, DObjectCache) -> T,
+//    public val refCache: DObjectCache,
+//    public val metaProvider: () -> Meta?
+//) : ObjectRef<T> {
+//    override fun resolve(): T? {
+//        val meta = metaProvider() ?: return null
+//        meta["\$ref"]?.int?.let { refId ->
+//            if (refCache.refStack.contains(refId)) {
+//                println("Circular reference $refId in stack ${refCache.refStack}")
+//                return null
+//            }
+//            return builder(refCache[refId], refCache.stack(refId))
+//        }
+//        return builder(meta, refCache)
+//    }
+//}
+
+public open class DObject(public val meta: Meta, private val refCache: DObjectCache) {
+
+    public val typename: String by meta.string(key = "_typename".asName()) {
+        error("Type is not defined")
+    }
+
+    private fun <T : DObject> resolve(builder: (Meta, DObjectCache) -> T, meta: Meta): T? {
+        meta["\$ref"]?.int?.let { refId ->
+            if (refCache.refStack.contains(refId)) {
+                println("Circular reference $refId in stack ${refCache.refStack}")
+                return null
+            }
+            return builder(refCache[refId], refCache.stack(refId))
+        }
+        return builder(meta, refCache)
+    }
+
+    internal fun <T : DObject> tObjectArray(
+        builder: (Meta, DObjectCache) -> T
+    ): ReadOnlyProperty<Any?, List<T>> = ReadOnlyProperty { _, property ->
+        meta.getIndexed(Name.of(property.name, "arr")).values.mapNotNull {
+            resolve(builder, it)
+        }
+    }
+
+    internal fun <T : DObject> dObject(
+        builder: (Meta, DObjectCache) -> T,
+        key: Name? = null
+    ): ReadOnlyProperty<Any?, T?> = ReadOnlyProperty { _, property ->
+        meta[key ?: property.name.asName()]?.let { resolve(builder, it) }
+    }
+}
+
+public open class DNamed(meta: Meta, refCache: DObjectCache) : DObject(meta, refCache) {
+    public val fName: String by meta.string("")
+    public val fTitle: String by meta.string("")
+}
+
+public class DGeoMaterial(meta: Meta, refCache: DObjectCache) : DNamed(meta, refCache) {
+}
+
+public class DGeoMedium(meta: Meta, refCache: DObjectCache) : DNamed(meta, refCache) {
+    public val fMaterial: DGeoMaterial? by dObject(::DGeoMaterial)
+    public val fParams: DoubleArray by meta.doubleArray()
+}
+
+public class DGeoShape(meta: Meta, refCache: DObjectCache) : DNamed(meta, refCache) {
+    public val fDX: Double by meta.double(0.0)
+    public val fDY: Double by meta.double(0.0)
+    public val fDZ: Double by meta.double(0.0)
+}
+
+public class DGeoVolume(meta: Meta, refCache: DObjectCache) : DNamed(meta, refCache), Named {
+    public val fNodes: List<DGeoNode> by tObjectArray(::DGeoNode)
+    public val fShape: DGeoShape? by dObject(::DGeoShape)
+    public val fMedium: DGeoMedium? by dObject(::DGeoMedium)
+
+    override val name: Name by lazy { Name.parse(fName.ifEmpty { "volume[${meta.hashCode().toUInt()}]" }) }
+}
+
+public class DGeoNode(meta: Meta, refCache: DObjectCache) : DNamed(meta, refCache) {
+    public val fVolume: DGeoVolume? by dObject(::DGeoVolume)
+}
+
+public class DGeoMatrix(meta: Meta, refCache: DObjectCache) : DNamed(meta, refCache) {
+}
+
+
+public class DGeoBoolNode(meta: Meta, refCache: DObjectCache) : DObject(meta, refCache) {
+    public val fLeft: DGeoShape? by dObject(::DGeoShape)
+    public val fLeftMat: DGeoMatrix? by dObject(::DGeoMatrix)
+
+    public val fRight: DGeoShape? by dObject(::DGeoShape)
+    public val fRightMat: DGeoMatrix? by dObject(::DGeoMatrix)
+}
+
+
+public class DGeoManager(meta: Meta, refCache: DObjectCache) : DNamed(meta, refCache) {
+    public val fMatrices: List<DGeoMatrix> by tObjectArray(::DGeoMatrix)
+
+    public val fShapes: List<DGeoShape> by tObjectArray(::DGeoShape)
+
+    public val fVolumes: List<DGeoVolume> by tObjectArray(::DGeoVolume)
+
+    public val fNodes: List<DGeoNode> by tObjectArray(::DGeoNode)
+
+    public companion object {
+
+        public fun parse(string: String): DGeoManager {
+            val meta = Json.decodeFromString(MetaSerializer, string)
+            val res = ArrayList<Meta>(4096)
+
+            fun fillCache(element: Meta) {
+                if (element["\$ref"] == null) {
+                    res.add(element)
+                    element.items.values.forEach {
+                        if (!it.isLeaf) {
+                            fillCache(it)
+                        }
+                    }
+                }
+            }
+
+            fillCache(meta)
+
+            val refCache = DObjectCache(res)
+            return DGeoManager(meta, refCache)
+        }
+    }
+}
diff --git a/cern-root-loader/src/commonMain/kotlin/ru/mipt/npm/root/TObjectScheme.kt b/cern-root-loader/src/commonMain/kotlin/ru/mipt/npm/root/TObjectScheme.kt
deleted file mode 100644
index 0ec699bd..00000000
--- a/cern-root-loader/src/commonMain/kotlin/ru/mipt/npm/root/TObjectScheme.kt
+++ /dev/null
@@ -1,140 +0,0 @@
-package ru.mipt.npm.root
-
-import kotlinx.serialization.json.Json
-import space.kscience.dataforge.meta.*
-import space.kscience.dataforge.names.Name
-import space.kscience.dataforge.names.asName
-import kotlin.properties.ReadOnlyProperty
-
-public typealias RefCache = List<Meta>
-
-public interface ObjectRef<T : TObjectScheme> {
-    public fun resolve(refCache: RefCache): T?
-}
-
-private class ChildObjectRef<T : TObjectScheme>(
-    val spec: Specification<T>,
-    val metaProvider: () -> Meta?
-) : ObjectRef<T> {
-    override fun resolve(refCache: RefCache): T? {
-        val meta = metaProvider() ?: return null
-        meta["\$ref"]?.int?.let { refId ->
-            return spec.read(refCache[refId])
-        }
-        return spec.read(meta)
-    }
-}
-
-public fun <T: TObjectScheme> List<ObjectRef<T>>.resolve(refCache: RefCache): List<T> = map { it.resolve(refCache)!! }
-
-
-public open class TObjectScheme : Scheme() {
-
-    public val typename: String by string(key = "_typename".asName()) { error("Type is not defined") }
-
-    internal fun <T : TObjectScheme> tObjectArray(
-        spec: Specification<T>
-    ): ReadOnlyProperty<Any?, List<ObjectRef<T>>> = ReadOnlyProperty { _, property ->
-        meta.getIndexed(Name.of(property.name, "arr")).values.map { ChildObjectRef(spec){it} }
-    }
-
-    internal fun <T : TObjectScheme> refSpec(
-        spec: Specification<T>,
-        key: Name? = null
-    ): ReadOnlyProperty<Any?, ObjectRef<T>> = ReadOnlyProperty { _, property ->
-        ChildObjectRef(spec) { meta[key ?: property.name.asName()] }
-    }
-
-    public companion object : SchemeSpec<TObjectScheme>(::TObjectScheme)
-}
-
-public open class TNamedScheme : TObjectScheme() {
-    public val fName: String by string("")
-    public val fTitle: String by string("")
-
-    public companion object : SchemeSpec<TNamedScheme>(::TNamedScheme)
-}
-
-public class TGeoMaterialScheme : TNamedScheme() {
-
-    public companion object : SchemeSpec<TGeoMaterialScheme>(::TGeoMaterialScheme)
-}
-
-public class TGeoMediumScheme : TNamedScheme() {
-    public val fMaterial: ObjectRef<TGeoMaterialScheme> by refSpec(TGeoMaterialScheme)
-    public val fParams: DoubleArray by doubleArray()
-
-    public companion object : SchemeSpec<TGeoMediumScheme>(::TGeoMediumScheme)
-}
-
-public class TGeoShapeScheme : TNamedScheme() {
-    public val fDX: Double by double(0.0)
-    public val fDY: Double by double(0.0)
-    public val fDZ: Double by double(0.0)
-
-    public companion object : SchemeSpec<TGeoShapeScheme>(::TGeoShapeScheme)
-}
-
-public class TGeoVolumeScheme : TNamedScheme() {
-    public val fNodes: List<ObjectRef<TGeoNodeScheme>> by tObjectArray(TGeoNodeScheme)
-    public val fShape: ObjectRef<TGeoShapeScheme> by refSpec(TGeoShapeScheme)
-    public val fMedium: ObjectRef<TGeoMediumScheme> by refSpec(TGeoMediumScheme)
-
-    public companion object : SchemeSpec<TGeoVolumeScheme>(::TGeoVolumeScheme)
-}
-
-public class TGeoNodeScheme : TNamedScheme() {
-    public val fVolume: ObjectRef<TGeoVolumeScheme> by refSpec(TGeoVolumeScheme)
-
-    public companion object : SchemeSpec<TGeoNodeScheme>(::TGeoNodeScheme)
-}
-
-public class TGeoMatrixScheme : TNamedScheme() {
-    public companion object : SchemeSpec<TGeoMatrixScheme>(::TGeoMatrixScheme)
-}
-
-
-public class TGeoBoolNodeScheme : TObjectScheme() {
-    public val fLeft: ObjectRef<TGeoShapeScheme> by refSpec(TGeoShapeScheme)
-    public val fLeftMat: ObjectRef<TGeoMatrixScheme> by refSpec(TGeoMatrixScheme)
-
-    public val fRight: ObjectRef<TGeoShapeScheme> by refSpec(TGeoShapeScheme)
-    public val fRightMat: ObjectRef<TGeoMatrixScheme> by refSpec(TGeoMatrixScheme)
-
-    public companion object : SchemeSpec<TGeoBoolNodeScheme>(::TGeoBoolNodeScheme)
-}
-
-
-public class TGeoManagerScheme : TNamedScheme() {
-    public val fMatrices: List<ObjectRef<TGeoMatrixScheme>> by tObjectArray(TGeoMatrixScheme)
-
-    public val fShapes: List<ObjectRef<TGeoShapeScheme>> by tObjectArray(TGeoShapeScheme)
-
-    public val fVolumes: List<ObjectRef<TGeoVolumeScheme>> by tObjectArray(TGeoVolumeScheme)
-
-    public val fNodes: List<ObjectRef<TGeoNodeScheme>> by tObjectArray(TGeoNodeScheme)
-
-    public val refCache: List<Meta> by lazy {
-        val res = ArrayList<Meta>(4096)
-        fun fillCache(element: Meta) {
-            if(element["\$ref"] == null) {
-                res.add(element)
-                element.items.values.forEach {
-                    if (!it.isLeaf) {
-                        fillCache(it)
-                    }
-                }
-            }
-        }
-        fillCache(meta)
-        res
-    }
-
-    public companion object : SchemeSpec<TGeoManagerScheme>(::TGeoManagerScheme) {
-
-        public fun parse(string: String): TGeoManagerScheme {
-            val meta = Json.decodeFromString(MetaSerializer, string)
-            return read(meta)
-        }
-    }
-}
diff --git a/cern-root-loader/src/commonMain/kotlin/ru/mipt/npm/root/dRootToSolid.kt b/cern-root-loader/src/commonMain/kotlin/ru/mipt/npm/root/dRootToSolid.kt
new file mode 100644
index 00000000..87422b97
--- /dev/null
+++ b/cern-root-loader/src/commonMain/kotlin/ru/mipt/npm/root/dRootToSolid.kt
@@ -0,0 +1,280 @@
+package ru.mipt.npm.root
+
+import space.kscience.dataforge.meta.double
+import space.kscience.dataforge.meta.get
+import space.kscience.dataforge.meta.int
+import space.kscience.dataforge.names.Name
+import space.kscience.dataforge.names.plus
+import space.kscience.visionforge.solid.*
+import kotlin.math.*
+
+private val volumesName = Name.EMPTY //"volumes".asName()
+
+private operator fun Number.times(d: Double) = toDouble() * d
+
+private operator fun Number.times(f: Float) = toFloat() * f
+
+private fun degToRad(d: Double) = d * PI / 180.0
+
+private class RootToSolidContext(val prototypeHolder: PrototypeHolder)
+
+// converting to XYZ to Tait–Bryan angles according to https://en.wikipedia.org/wiki/Euler_angles#Rotation_matrix
+private fun Solid.rotate(rot: DoubleArray) {
+    val xAngle = atan2(-rot[5], rot[8])
+    val yAngle = atan2(rot[2], sqrt(1.0 - rot[2].pow(2)))
+    val zAngle = atan2(-rot[1], rot[0])
+    rotation = Point3D(xAngle, yAngle, zAngle)
+}
+
+private fun Solid.translate(trans: DoubleArray) {
+    val (x, y, z) = trans
+    position = Point3D(x, y, z)
+}
+
+private fun Solid.useMatrix(matrix: DGeoMatrix?) {
+    if (matrix == null) return
+    when (matrix.typename) {
+        "TGeoIdentity" -> {
+            //do nothing
+        }
+        "TGeoTranslation" -> {
+            val fTranslation by matrix.meta.doubleArray()
+            translate(fTranslation)
+        }
+        "TGeoRotation" -> {
+            val fRotationMatrix by matrix.meta.doubleArray()
+            rotate(fRotationMatrix)
+        }
+        "TGeoCombiTrans" -> {
+            val fTranslation by matrix.meta.doubleArray()
+
+            translate(fTranslation)
+            if (matrix.meta["fRotationMatrix"] != null) {
+                val fRotationMatrix by matrix.meta.doubleArray()
+                rotate(fRotationMatrix)
+            }
+        }
+        "TGeoHMatrix" -> {
+            val fTranslation by matrix.meta.doubleArray()
+            val fRotationMatrix by matrix.meta.doubleArray()
+            val fScale by matrix.meta.doubleArray()
+            translate(fTranslation)
+            rotate(fRotationMatrix)
+            scale = Point3D(fScale[0], fScale[1], fScale[2])
+        }
+    }
+}
+
+private fun SolidGroup.addShape(
+    shape: DGeoShape,
+    context: RootToSolidContext,
+    name: String? = shape.fName.ifEmpty { null }
+): Solid? = when (shape.typename) {
+    "TGeoCompositeShape" -> {
+        val fNode: DGeoBoolNode? by shape.dObject(::DGeoBoolNode)
+        val node = fNode ?: error("Composite shape node not resolved")
+        val compositeType = when (node.typename) {
+            "TGeoIntersection" -> CompositeType.INTERSECT
+            "TGeoSubtraction" -> CompositeType.SUBTRACT
+            "TGeoUnion" -> CompositeType.UNION
+            else -> error("Unknown bool node type ${node.typename}")
+        }
+        composite(compositeType, name = name) {
+            addShape(node.fLeft!!, context, "left").also {
+                if (it == null) TODO()
+                it.useMatrix(node.fLeftMat)
+            }
+            addShape(node.fRight!!, context, "right").also {
+                if (it == null) TODO()
+                it.useMatrix(node.fRightMat)
+            }
+        }
+    }
+    "TGeoXtru" -> {
+        val fNvert by shape.meta.int(0)
+        val fX by shape.meta.doubleArray()
+        val fY by shape.meta.doubleArray()
+        val fNz by shape.meta.int(0)
+        val fZ by shape.meta.doubleArray()
+        val fX0 by shape.meta.doubleArray()
+        val fY0 by shape.meta.doubleArray()
+        val fScale by shape.meta.doubleArray()
+
+        extruded(name = name) {
+            (0 until fNvert).forEach { index ->
+                shape {
+                    point(fX[index], fY[index])
+                }
+            }
+
+            (0 until fNz).forEach { index ->
+                layer(
+                    fZ[index],
+                    fX0[index],
+                    fY0[index],
+                    fScale[index]
+                )
+            }
+        }
+    }
+    "TGeoTube" -> {
+        val fRmax by shape.meta.double(0.0)
+        val fDz by shape.meta.double(0.0)
+        val fRmin by shape.meta.double(0.0)
+
+        tube(
+            radius = fRmax,
+            height = fDz * 2,
+            innerRadius = fRmin,
+            name = name
+        )
+    }
+    "TGeoTubeSeg" -> {
+        val fRmax by shape.meta.double(0.0)
+        val fDz by shape.meta.double(0.0)
+        val fRmin by shape.meta.double(0.0)
+        val fPhi1 by shape.meta.double(0.0)
+        val fPhi2 by shape.meta.double(0.0)
+
+        tube(
+            radius = fRmax,
+            height = fDz * 2,
+            innerRadius = fRmin,
+            startAngle = degToRad(fPhi1),
+            angle = degToRad(fPhi2 - fPhi1),
+            name = name
+        )
+    }
+    "TGeoPcon" -> {
+        val fDphi by shape.meta.double(0.0)
+        val fNz by shape.meta.int(2)
+        val fPhi1 by shape.meta.double(360.0)
+        val fRmax by shape.meta.doubleArray()
+        val fRmin by shape.meta.doubleArray()
+        val fZ by shape.meta.doubleArray()
+        if (fNz == 2) {
+            coneSurface(
+                bottomOuterRadius = fRmax[0],
+                bottomInnerRadius = fRmin[0],
+                height = fZ[1] - fZ[0],
+                topOuterRadius = fRmax[1],
+                topInnerRadius = fRmin[1],
+                startAngle = degToRad(fPhi1),
+                angle = degToRad(fDphi),
+                name = name
+            ) {
+                z = (fZ[1] + fZ[0]) / 2
+            }
+        } else {
+            TODO()
+        }
+    }
+    "TGeoPgon" -> {
+        val fDphi by shape.meta.double(0.0)
+        val fNz by shape.meta.int(2)
+        val fPhi1 by shape.meta.double(360.0)
+        val fRmax by shape.meta.doubleArray()
+        val fRmin by shape.meta.doubleArray()
+        val fZ by shape.meta.doubleArray()
+
+        val fNedges by shape.meta.int(1)
+
+        val startphi = degToRad(fPhi1)
+        val deltaphi = degToRad(fDphi)
+
+        extruded(name) {
+            //getting the radius of first
+            require(fNz > 1) { "The polyhedron geometry requires at least two planes" }
+            val baseRadius = fRmax[0]
+            shape {
+                (0..fNedges).forEach {
+                    val phi = deltaphi * fNedges * it + startphi
+                    (baseRadius * cos(phi) to baseRadius * sin(phi))
+                }
+            }
+            (0 until fNz).forEach { index ->
+                //scaling all radii relative to first layer radius
+                layer(fZ[index], scale = fRmax[index] / baseRadius)
+            }
+        }
+    }
+    "TGeoShapeAssembly" -> {
+        val fVolume by shape.dObject(::DGeoVolume)
+        fVolume?.let { volume ->
+            addRootVolume(volume, context)
+        }
+    }
+    "TGeoBBox" -> {
+        box(shape.fDX * 2, shape.fDY * 2, shape.fDZ * 2, name = name)
+    }
+    else -> {
+        TODO("A shape with type ${shape.typename} not implemented")
+    }
+}
+
+private fun SolidGroup.addRootNode(obj: DGeoNode, context: RootToSolidContext) {
+    val volume = obj.fVolume ?: return
+    addRootVolume(volume, context, obj.fName).apply {
+        when (obj.typename) {
+            "TGeoNodeMatrix" -> {
+                val fMatrix by obj.dObject(::DGeoMatrix)
+                useMatrix(fMatrix)
+            }
+            "TGeoNodeOffset" -> {
+                val fOffset by obj.meta.double(0.0)
+                x = fOffset
+            }
+        }
+    }
+}
+
+private fun buildGroup(volume: DGeoVolume, context: RootToSolidContext): SolidGroup = SolidGroup {
+    volume.fShape?.let {
+        addShape(it, context)
+    }
+    volume.fNodes.let {
+        it.forEach { node ->
+            addRootNode(node, context)
+        }
+    }
+}
+
+//private val SolidGroup.rootPrototypes: SolidGroup get() = (parent as? SolidGroup)?.rootPrototypes ?: this
+
+private fun SolidGroup.addRootVolume(
+    volume: DGeoVolume,
+    context: RootToSolidContext,
+    name: String? = null,
+    cache: Boolean = true
+): Solid {
+    val combinedName = if (volume.fName.isEmpty()) {
+        name
+    } else if (name == null) {
+        volume.fName
+    } else {
+        "${name}_${volume.fName}"
+    }
+
+    return if (!cache) {
+        val group = buildGroup(volume, context)
+        set(combinedName?.let { Name.parse(it) }, group)
+        group
+    } else {
+        val templateName = volumesName + volume.name
+        val existing = getPrototype(templateName)
+        if (existing == null) {
+            context.prototypeHolder.prototypes {
+                set(templateName, buildGroup(volume, context))
+            }
+        }
+
+        return ref(templateName, name)
+    }
+}
+
+public fun DGeoManager.toSolid(): SolidGroup = SolidGroup {
+    val context = RootToSolidContext(this)
+    fNodes.forEach { node ->
+        addRootNode(node, context)
+    }
+}
\ No newline at end of file
diff --git a/cern-root-loader/src/commonMain/kotlin/ru/mipt/npm/root/rootSchemeToSolid.kt b/cern-root-loader/src/commonMain/kotlin/ru/mipt/npm/root/rootSchemeToSolid.kt
deleted file mode 100644
index 89849613..00000000
--- a/cern-root-loader/src/commonMain/kotlin/ru/mipt/npm/root/rootSchemeToSolid.kt
+++ /dev/null
@@ -1,217 +0,0 @@
-package ru.mipt.npm.root
-
-import space.kscience.dataforge.meta.*
-import space.kscience.dataforge.names.Name
-import space.kscience.dataforge.names.asName
-import space.kscience.dataforge.names.plus
-import space.kscience.visionforge.solid.*
-import kotlin.math.PI
-import kotlin.math.atan2
-import kotlin.math.pow
-import kotlin.math.sqrt
-
-private val solidsName = "solids".asName()
-private val volumesName = "volumes".asName()
-
-private operator fun Number.times(d: Double) = toDouble() * d
-
-private operator fun Number.times(f: Float) = toFloat() * f
-
-private fun degToRad(d: Double) = d * PI / 180.0
-
-// converting to XYZ to Tait–Bryan angles according to https://en.wikipedia.org/wiki/Euler_angles#Rotation_matrix
-private fun Solid.rotate(rot: DoubleArray) {
-    val xAngle = atan2(-rot[5], rot[8])
-    val yAngle = atan2(rot[2], sqrt(1.0 - rot[2].pow(2)))
-    val zAngle = atan2(-rot[1], rot[0])
-    rotation = Point3D(xAngle, yAngle, zAngle)
-}
-
-private fun Solid.translate(trans: DoubleArray) {
-    val (x, y, z) = trans
-    position = Point3D(x, y, z)
-}
-
-private fun Solid.useMatrix(matrix: TGeoMatrixScheme?) {
-    if (matrix == null) return
-    when (matrix.typename) {
-        "TGeoIdentity" -> {
-            //do nothing
-        }
-        "TGeoTranslation" -> {
-            val fTranslation by matrix.doubleArray()
-            translate(fTranslation)
-        }
-        "TGeoRotation" -> {
-            val fRotationMatrix by matrix.doubleArray()
-            rotate(fRotationMatrix)
-        }
-        "TGeoCombiTrans" -> {
-            val fTranslation by matrix.doubleArray()
-
-            translate(fTranslation)
-            if (matrix.meta["fRotationMatrix"] != null) {
-                val fRotationMatrix by matrix.doubleArray()
-                rotate(fRotationMatrix)
-            }
-        }
-        "TGeoHMatrix" -> {
-            val fTranslation by matrix.doubleArray()
-            val fRotationMatrix by matrix.doubleArray()
-            val fScale by matrix.doubleArray()
-            translate(fTranslation)
-            rotate(fRotationMatrix)
-            scale = Point3D(fScale[0], fScale[1], fScale[2])
-        }
-    }
-}
-
-private fun SolidGroup.addShape(shape: TGeoShapeScheme, refCache: RefCache) {
-    when (shape.typename) {
-        "TGeoCompositeShape" -> {
-            val bool by shape.spec(TGeoBoolNodeScheme)
-            val compositeType = when (bool.typename) {
-                "TGeoIntersection" -> CompositeType.INTERSECT
-                "TGeoSubtraction" -> CompositeType.SUBTRACT
-                "TGeoUnion" -> CompositeType.UNION
-                else -> error("Unknown bool node type ${bool.typename}")
-            }
-            composite(compositeType, name = shape.fName) {
-                addShape(bool.fLeft.resolve(refCache)!!, refCache).apply {
-                    useMatrix(bool.fLeftMat.resolve(refCache))
-                }
-                addShape(bool.fRight.resolve(refCache)!!, refCache).apply {
-                    useMatrix(bool.fRightMat.resolve(refCache))
-                }
-            }
-        }
-        "TGeoXtru" -> {
-            val fNvert by shape.meta.int(0)
-            val fX by shape.meta.doubleArray()
-            val fY by shape.meta.doubleArray()
-            val fNz by shape.meta.int(0)
-            val fZ by shape.meta.doubleArray()
-            val fX0 by shape.meta.doubleArray()
-            val fY0 by shape.meta.doubleArray()
-            val fScale by shape.meta.doubleArray()
-
-            extruded(name = shape.fName) {
-                (0 until fNvert).forEach { index ->
-                    shape {
-                        point(fX[index], fY[index])
-                    }
-                }
-
-                (0 until fNz).forEach { index ->
-                    layer(
-                        fZ[index],
-                        fX0[index],
-                        fY0[index],
-                        fScale[index]
-                    )
-                }
-            }
-        }
-        "TGeoTube" -> {
-            val fRmax by shape.meta.double(0.0)
-            val fDz by shape.meta.double(0.0)
-            val fRmin by shape.meta.double(0.0)
-
-            tube(
-                radius = fRmax,
-                height = fDz * 2,
-                innerRadius = fRmin,
-                name = shape.fName
-            )
-        }
-        "TGeoTubeSeg" -> {
-            val fRmax by shape.meta.double(0.0)
-            val fDz by shape.meta.double(0.0)
-            val fRmin by shape.meta.double(0.0)
-            val fPhi1 by shape.meta.double(0.0)
-            val fPhi2 by shape.meta.double(0.0)
-
-            tube(
-                radius = fRmax,
-                height = fDz * 2,
-                innerRadius = fRmin,
-                startAngle = degToRad(fPhi1),
-                angle = degToRad(fPhi2 - fPhi1),
-                name = shape.fName
-            )
-        }
-        "TGeoPcon" -> {
-            TODO()
-        }
-        "TGeoPgon" -> {
-            TODO()
-        }
-        "TGeoShapeAssembly" -> {
-            val fVolume by shape.refSpec(TGeoVolumeScheme)
-            volume(fVolume.resolve(refCache)!!, refCache)
-        }
-        "TGeoBBox" -> {
-            box(shape.fDX * 2, shape.fDY * 2, shape.fDZ * 2, name = shape.fName)
-        }
-    }
-}
-
-private fun SolidGroup.node(obj: TGeoNodeScheme, refCache: RefCache) {
-    val volume = obj.fVolume.resolve(refCache)
-    if (volume != null) {
-        volume(volume, refCache, obj.fName).apply {
-            when (obj.typename) {
-                "TGeoNodeMatrix" -> {
-                    val fMatrix by obj.refSpec(TGeoMatrixScheme)
-                    useMatrix(fMatrix.resolve(refCache))
-                }
-                "TGeoNodeOffset" -> {
-                    val fOffset by obj.meta.double(0.0)
-                    x = fOffset
-                }
-            }
-        }
-    }
-}
-
-private fun buildGroup(volume: TGeoVolumeScheme, refCache: RefCache): SolidGroup = SolidGroup {
-    volume.fShape.resolve(refCache)?.let { addShape(it, refCache) }
-    volume.fNodes.let {
-        it.forEach { obj ->
-            node(obj.resolve(refCache)!!, refCache)
-        }
-    }
-}
-
-private val SolidGroup.rootPrototypes: SolidGroup get() = (parent as? SolidGroup)?.rootPrototypes ?: this
-
-private fun SolidGroup.volume(
-    volume: TGeoVolumeScheme,
-    refCache: RefCache,
-    name: String? = null,
-    cache: Boolean = true
-): Solid {
-    val group = buildGroup(volume, refCache)
-    val combinedName = if (volume.fName.isEmpty()) {
-        name
-    } else if (name == null) {
-        volume.fName
-    } else {
-        "${name}_${volume.fName}"
-    }
-    return if (!cache) {
-        set(combinedName?.let { Name.parse(it)},group)
-        group
-    } else newRef(
-        name = combinedName,
-        obj = group,
-        prototypeHolder = rootPrototypes,
-        templateName = volumesName + Name.parse(combinedName ?: "volume[${group.hashCode()}]")
-    )
-}
-
-public fun TGeoManagerScheme.toSolid(): SolidGroup = SolidGroup {
-    fNodes.forEach {
-        node(it.resolve(refCache)!!, refCache)
-    }
-}
\ No newline at end of file
diff --git a/cern-root-loader/src/jvmTest/kotlin/ru/mipt/npm/root/loadBMN.kt b/cern-root-loader/src/jvmTest/kotlin/ru/mipt/npm/root/loadBMN.kt
index fbd7482e..fdbcea6d 100644
--- a/cern-root-loader/src/jvmTest/kotlin/ru/mipt/npm/root/loadBMN.kt
+++ b/cern-root-loader/src/jvmTest/kotlin/ru/mipt/npm/root/loadBMN.kt
@@ -5,8 +5,14 @@ import kotlinx.serialization.json.JsonElement
 import kotlinx.serialization.json.JsonObject
 import kotlinx.serialization.json.jsonPrimitive
 import ru.mipt.npm.root.serialization.TGeoManager
+import space.kscience.dataforge.meta.Meta
+import space.kscience.dataforge.meta.get
+import space.kscience.dataforge.meta.isLeaf
+import space.kscience.dataforge.values.string
 import space.kscience.visionforge.solid.Solids
+import java.nio.file.Paths
 import java.time.Duration
+import kotlin.io.path.writeText
 import kotlin.system.measureTimeMillis
 
 private fun JsonElement.countTypes(): Sequence<String> = sequence {
@@ -25,14 +31,28 @@ private fun JsonElement.countTypes(): Sequence<String> = sequence {
     }
 }
 
+private fun Meta.countTypes() :Sequence<String>  = sequence {
+    if(!isLeaf){
+        get("_typename")?.value?.let { yield(it.string) }
+        items.forEach { yieldAll(it.value.countTypes()) }
+    }
+}
+
 fun main() {
     val string = TGeoManager::class.java.getResourceAsStream("/BM@N.root.json")!!
         .readAllBytes().decodeToString()
     val time = measureTimeMillis {
-        val geo = TGeoManagerScheme.parse(string)
+        val geo = DGeoManager.parse(string)
+
+        val sizes = geo.meta.countTypes().groupBy { it }.mapValues { it.value.size }
+        sizes.forEach {
+            println(it)
+        }
+
         val solid = geo.toSolid()
 
-        println(Solids.encodeToString(solid))
+        Paths.get("BM@N.vf.json").writeText(Solids.encodeToString(solid))
+        //println(Solids.encodeToString(solid))
     }
 
 //    val json = Json.parseToJsonElement(string)
diff --git a/visionforge-solid/src/commonMain/kotlin/space/kscience/visionforge/solid/Composite.kt b/visionforge-solid/src/commonMain/kotlin/space/kscience/visionforge/solid/Composite.kt
index 9debf612..00db285c 100644
--- a/visionforge-solid/src/commonMain/kotlin/space/kscience/visionforge/solid/Composite.kt
+++ b/visionforge-solid/src/commonMain/kotlin/space/kscience/visionforge/solid/Composite.kt
@@ -5,6 +5,7 @@ import kotlinx.serialization.Serializable
 import space.kscience.dataforge.meta.update
 import space.kscience.visionforge.VisionBuilder
 import space.kscience.visionforge.VisionContainerBuilder
+import space.kscience.visionforge.VisionPropertyContainer
 import space.kscience.visionforge.set
 
 public enum class CompositeType {
@@ -20,7 +21,7 @@ public class Composite(
     public val compositeType: CompositeType,
     public val first: Solid,
     public val second: Solid,
-) : SolidBase(), Solid
+) : SolidBase(), VisionPropertyContainer<Composite>
 
 @VisionBuilder
 public inline fun VisionContainerBuilder<Solid>.composite(
@@ -30,7 +31,7 @@ public inline fun VisionContainerBuilder<Solid>.composite(
 ): Composite {
     val group = SolidGroup().apply(builder)
     val children = group.children.values.filterIsInstance<Solid>()
-    if (children.size != 2) error("Composite requires exactly two children")
+    if (children.size != 2) error("Composite requires exactly two children, but found ${children.size}")
     val res = Composite(type, children[0], children[1])
 
     res.meta.update(group.meta)
diff --git a/visionforge-solid/src/commonMain/kotlin/space/kscience/visionforge/solid/SolidReference.kt b/visionforge-solid/src/commonMain/kotlin/space/kscience/visionforge/solid/SolidReference.kt
index f58bcf8b..eeab05ff 100644
--- a/visionforge-solid/src/commonMain/kotlin/space/kscience/visionforge/solid/SolidReference.kt
+++ b/visionforge-solid/src/commonMain/kotlin/space/kscience/visionforge/solid/SolidReference.kt
@@ -165,7 +165,7 @@ public fun SolidGroup.ref(
 
 /**
  * Add new [SolidReferenceGroup] wrapping given object and automatically adding it to the prototypes.
- * One must ensure that [prototypeHolder] is the owner of this group.
+ * One must ensure that [prototypeHolder] is a parent of this group.
  */
 public fun SolidGroup.newRef(
     name: String?,