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
index d6b7b4ce..ba3e4616 100644
--- 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
@@ -188,7 +188,7 @@ private fun SolidGroup.addShape(
         }
 
         "TGeoPgon" -> {
-            //TODO add a inner polygone layer
+
             val fDphi by shape.meta.double(0.0)
             val fNz by shape.meta.int(2)
             val fPhi1 by shape.meta.double(360.0)
@@ -201,19 +201,26 @@ private fun SolidGroup.addShape(
             val startphi = degToRad(fPhi1)
             val deltaphi = degToRad(fDphi)
 
-            extruded(name) {
+            fun Shape2DBuilder.pGon(radius: Double){
+                (0..<fNedges).forEach {
+                    val phi = deltaphi / fNedges * it + startphi
+                    point(radius * cos(phi), radius * sin(phi))
+                }
+            }
+
+            surface(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
-                        point(baseRadius * cos(phi), baseRadius * sin(phi))
-                    }
-                }
-                (0 until fNz).forEach { index ->
-                    //scaling all radii relative to first layer radius
-                    layer(fZ[index], scale = fRmax[index] / baseRadius)
+                for (index in 0 until fNz){
+                    layer(
+                        fZ[index],
+                        innerBuilder = {
+                            pGon(fRmin[index])
+                        },
+                        outerBuilder = {
+                            pGon(fRmax[index])
+                        }
+                    )
                 }
             }.apply(block)
         }
diff --git a/demo/playground/src/jvmMain/kotlin/extruded.kt b/demo/playground/src/jvmMain/kotlin/extruded.kt
index af8fe6d0..c45b2564 100644
--- a/demo/playground/src/jvmMain/kotlin/extruded.kt
+++ b/demo/playground/src/jvmMain/kotlin/extruded.kt
@@ -14,6 +14,7 @@ fun main() = makeVisionFile {
                     polygon(8, 100)
                 }
                 layer(-30)
+                layer(0, x = 10, y = 10)
                 layer(30)
             }
         }
diff --git a/demo/playground/src/jvmMain/kotlin/surface.kt b/demo/playground/src/jvmMain/kotlin/surface.kt
index 9bcc9e2f..01fbfb50 100644
--- a/demo/playground/src/jvmMain/kotlin/surface.kt
+++ b/demo/playground/src/jvmMain/kotlin/surface.kt
@@ -10,9 +10,9 @@ fun main() = makeVisionFile {
         solid {
             ambientLight()
             surface("surface") {
-                layer(0, {polygon(8,10)}, {polygon(8,20)})
-                layer(10, {polygon(8,10)}, {polygon(8,30)})
-
+                layer(0, { polygon(8, 10) }, { polygon(8, 20) })
+                layer(10, { polygon(8, 20) }, { polygon(8, 30) })
+                layer(20, { polygon(8, 10) }, { polygon(8, 20) })
             }
         }
     }