diff --git a/dataforge-vis-spatial-js/build.gradle.kts b/dataforge-vis-spatial-js/build.gradle.kts
index 9c045a7c..4693abbf 100644
--- a/dataforge-vis-spatial-js/build.gradle.kts
+++ b/dataforge-vis-spatial-js/build.gradle.kts
@@ -25,6 +25,7 @@ configure<KotlinFrontendExtension> {
     configure<NpmExtension> {
         dependency("three-full")
         dependency("style-loader")
+        dependency("element-resize-event")
         devDependency("karma")
     }
 
diff --git a/dataforge-vis-spatial-js/src/main/kotlin/hep/dataforge/vis/spatial/ThreeOutput.kt b/dataforge-vis-spatial-js/src/main/kotlin/hep/dataforge/vis/spatial/ThreeOutput.kt
index 32e0d1b8..e40c306a 100644
--- a/dataforge-vis-spatial-js/src/main/kotlin/hep/dataforge/vis/spatial/ThreeOutput.kt
+++ b/dataforge-vis-spatial-js/src/main/kotlin/hep/dataforge/vis/spatial/ThreeOutput.kt
@@ -6,6 +6,7 @@ import hep.dataforge.meta.*
 import hep.dataforge.output.Output
 import hep.dataforge.vis.common.DisplayGroup
 import hep.dataforge.vis.common.DisplayObject
+import hep.dataforge.vis.spatial.demo.require
 import hep.dataforge.vis.spatial.three.Group
 import info.laht.threekt.WebGLRenderer
 import info.laht.threekt.cameras.PerspectiveCamera
@@ -18,6 +19,8 @@ import info.laht.threekt.scenes.Scene
 import org.w3c.dom.Element
 import kotlin.browser.window
 
+private val elementResizeEvent = require("element-resize-event")
+
 class ThreeOutput(override val context: Context, val meta: Meta = EmptyMeta) : Output<DisplayObject> {
 
     private val aspectRatio by meta.number(1.0).double
@@ -41,7 +44,6 @@ class ThreeOutput(override val context: Context, val meta: Meta = EmptyMeta) : O
     }
 
     fun attach(element: Element, computeWidth: Element.() -> Int = { element.clientWidth }) {
-
         val width by meta.number(computeWidth(element)).int
 
         val height: Int = (width / aspectRatio).toInt()
@@ -60,13 +62,11 @@ class ThreeOutput(override val context: Context, val meta: Meta = EmptyMeta) : O
             renderer.render(scene, camera)
         }
 
-        window.addEventListener("resize", {
+        elementResizeEvent(element) {
             camera.updateProjectionMatrix()
-
-            val width by meta.number(computeWidth(element)).int
-
-            renderer.setSize(width, (width / aspectRatio).toInt())
-        }, false)
+            val newWidth = computeWidth(element)
+            renderer.setSize(newWidth, (newWidth / aspectRatio).toInt())
+        }
 
         element.replaceWith(renderer.domElement)
         animate()
diff --git a/dataforge-vis-spatial-js/src/main/kotlin/hep/dataforge/vis/spatial/demo/ThreeDemoGrid.kt b/dataforge-vis-spatial-js/src/main/kotlin/hep/dataforge/vis/spatial/demo/ThreeDemoGrid.kt
index c6be504f..fd962164 100644
--- a/dataforge-vis-spatial-js/src/main/kotlin/hep/dataforge/vis/spatial/demo/ThreeDemoGrid.kt
+++ b/dataforge-vis-spatial-js/src/main/kotlin/hep/dataforge/vis/spatial/demo/ThreeDemoGrid.kt
@@ -52,8 +52,7 @@ class ThreeDemoGrid(meta: Meta) : AbstractPlugin(meta), OutputManager {
                     div("col-4") {
                         h2 { +(meta["title"].string ?: name.toString()) }
                         hr()
-                        val id = "output-$name"
-                        output.attach(div { this.id = id }) { 300 }
+                        output.attach(div { id = "output-$name" })
                     }
                 }
             }
diff --git a/dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/Extruded.kt b/dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/Extruded.kt
index 5f015b23..79c00cb9 100644
--- a/dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/Extruded.kt
+++ b/dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/Extruded.kt
@@ -6,18 +6,37 @@ import hep.dataforge.vis.common.DisplayLeaf
 import hep.dataforge.vis.common.DisplayObject
 import hep.dataforge.vis.common.DisplayObjectList
 
+
+typealias Shape2D = List<Point2D>
+
+data class Layer(val z: Number, val x: Number = 0.0, val y: Number = 0.0, val scale: Number = 1.0)
+
 class Extruded(parent: DisplayObject?, meta: Meta) : DisplayLeaf(parent, meta) {
 
-    val shape get() = shape(properties["shape"] ?: error("Shape not defined"))
+    val shape
+        get() = shape(properties["shape"] ?: error("Shape not defined"))
+
+    val layers
+        get() = properties.getAll("layer").values.map {
+            layer(it.node ?: error("layer item is not a node"))
+        }
 
     companion object {
         const val TYPE = "geometry.3d.extruded"
 
-        fun shape(item: MetaItem<*>): Shape2D {
+        private fun shape(item: MetaItem<*>): Shape2D {
             return item.node?.getAll("xyPoint".toName())?.map { (_, value) ->
                 Point2D(value.node["x"].number ?: 0, value.node["y"].number ?: 0)
             } ?: emptyList()
         }
+
+        private fun layer(meta: Meta): Layer {
+            val x by meta.number(0.0)
+            val y by meta.number(0.0)
+            val z by meta.number { error("z is undefined in layer") }
+            val scale by meta.number(1.0)
+            return Layer(z, x, y, scale)
+        }
     }
 }
 
diff --git a/dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/GeometryBuilder.kt b/dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/GeometryBuilder.kt
index f0b68705..f3c0fa9a 100644
--- a/dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/GeometryBuilder.kt
+++ b/dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/GeometryBuilder.kt
@@ -8,8 +8,6 @@ import hep.dataforge.vis.common.DisplayObject
 
 data class Point2D(val x: Number, val y: Number)
 
-typealias Shape2D = List<Point2D>
-
 data class Point3D(val x: Number, val y: Number, val z: Number) : MetaRepr {
     override fun toMeta(): Meta = buildMeta {
         "x" to x