diff --git a/examples/dminer/src/dminer/core/world.d b/examples/dminer/src/dminer/core/world.d
index bd976d5b..927b7ce0 100644
--- a/examples/dminer/src/dminer/core/world.d
+++ b/examples/dminer/src/dminer/core/world.d
@@ -227,10 +227,6 @@ private:
     DiamondVisitor visitorHelper;
 }
 
-interface ChunkVisitor {
-    void visit(World world, SmallChunk * chunk);
-}
-
 struct DiamondVisitor {
     int maxDist;
     int maxDistBits;
@@ -489,6 +485,9 @@ struct DiamondVisitor {
     }
 }
 
+interface ChunkVisitor {
+    void visit(World world, SmallChunk * chunk);
+}
 
 struct VisitorCell {
     SmallChunk * chunk;
@@ -499,11 +498,18 @@ struct VisitorCell {
 
 struct ChunkDiamondVisitor {
     World world;
+    ChunkVisitor visitor;
     Vector3d pos;
     Array3d!VisitorCell cells;
     int maxDist;
     Vector3dArray oldcells;
     Vector3dArray newcells;
+    void init(World world, int distance, ChunkVisitor visitor) {
+        this.world = world;
+        this.maxDist = (distance + 7) / 8;
+        cells.reset(maxDist);
+        this.visitor = visitor;
+    }
     void visitCell(VisitorCell * oldCell, int x, int y, int z, Dir direction) {
         if (x < -maxDist || x > maxDist || y < -maxDist || y > maxDist || z < -maxDist || z > maxDist)
             return; // out of bounds
@@ -515,12 +521,10 @@ struct ChunkDiamondVisitor {
         }
         cell.dirFlags |= (1 << direction);
     }
-    void visitChunks(World world, Vector3d pos, int distance) {
-        this.world = world;
+    void visitChunks(Vector3d pos) {
         this.pos = pos;
-        this.maxDist = (distance + 7) / 8;
-        cells.reset(distance);
-        cells[1,2,3] = VisitorCell.init;
+        cells.reset(maxDist);
+        //cells[1,2,3] = VisitorCell.init;
         oldcells.clear();
         oldcells.append(Vector3d(0, 0, 0));
         for (int dist = 0; dist < maxDist * 2; dist++) {
@@ -561,6 +565,8 @@ struct ChunkDiamondVisitor {
                 Vector3d pt = oldcells[i];
                 auto cell = cells.ptr(pt.x, pt.y, pt.z);
                 // TODO: call visitor
+                if (cell.chunk)
+                    visitor.visit(world, cell.chunk);
             }
         }
     }
diff --git a/examples/dminer/src/minermain.d b/examples/dminer/src/minermain.d
index 320ed47d..2d377a2f 100644
--- a/examples/dminer/src/minermain.d
+++ b/examples/dminer/src/minermain.d
@@ -9,6 +9,7 @@ import dlangui.graphics.scene.effect;
 import dlangui.graphics.scene.model;
 import dlangui.graphics.scene.node;
 import dlangui.graphics.scene.light;
+import dlangui.graphics.scene.drawableobject;
 import dlangui.graphics.glsupport;
 import dlangui.graphics.gldrawbuf;
 import dlangui.graphics.scene.effect;
@@ -52,6 +53,35 @@ extern (C) int UIAppMain(string[] args) {
     return Platform.instance.enterMessageLoop();
 }
 
+class MinerDrawable : MaterialDrawableObject, ChunkVisitor {
+
+    import dlangui.graphics.scene.node;
+    World _world;
+    ChunkDiamondVisitor _chunkVisitor;
+    Vector3d _pos;
+    private Node3d _node;
+
+    this(World world) {
+        _world = world;
+    }
+    override void draw(Node3d node, bool wireframe) {
+        /// override it
+        _node = node;
+        _chunkVisitor.init(_world, 128, this);
+        _chunkVisitor.visitChunks(_pos);
+    }
+    void visit(World world, SmallChunk * chunk) {
+        if (chunk) {
+            Mesh mesh = chunk.getMesh(world);
+            if (mesh) {
+                _material.bind(_node, mesh, lights(_node));
+                _material.drawMesh(mesh);
+                _material.unbind();
+            }
+        }
+    }
+}
+
 class UiWidget : VerticalLayout, CellVisitor {
     this() {
         super("OpenGLView");
diff --git a/src/dlangui/graphics/domrender/renderblock.d b/src/dlangui/graphics/domrender/renderblock.d
index e4635d74..4adc0179 100644
--- a/src/dlangui/graphics/domrender/renderblock.d
+++ b/src/dlangui/graphics/domrender/renderblock.d
@@ -12,4 +12,5 @@ class RenderBlock {
     Rect borderWidth;
     Rect borderStyle;
     Collection!RenderBlock children;
-}
+
+}
\ No newline at end of file
diff --git a/src/dlangui/graphics/scene/drawableobject.d b/src/dlangui/graphics/scene/drawableobject.d
index bc73a92f..f85d95fc 100644
--- a/src/dlangui/graphics/scene/drawableobject.d
+++ b/src/dlangui/graphics/scene/drawableobject.d
@@ -8,6 +8,7 @@ import dlangui.core.types;
 /// Reference counted DrawableObject
 alias DrawableObjectRef = Ref!DrawableObject;
 
+/// base drawable object
 class DrawableObject : RefCountedObject {
 
     import dlangui.graphics.scene.node;
@@ -18,3 +19,59 @@ class DrawableObject : RefCountedObject {
         /// override it
     }
 }
+
+/// base drawable object with material
+class MaterialDrawableObject : DrawableObject {
+    import dlangui.graphics.scene.node;
+    import dlangui.graphics.scene.material;
+    import dlangui.graphics.scene.light;
+
+    protected MaterialRef _material;
+    protected bool _autobindLights = true;
+    protected Lights _lights;
+
+    this() {
+    }
+
+    this(Material material) {
+        _material = material;
+    }
+
+    @property ref MaterialRef material() { return _material; }
+
+    @property bool autobindLights() { return _autobindLights; }
+    @property MaterialDrawableObject autobindLights(bool flg) { _autobindLights = flg; return this; }
+
+    MaterialDrawableObject bindLight(Light light) {
+        _lights.add(light);
+        return this;
+    }
+
+    MaterialDrawableObject unbindLight(Light light) {
+        _lights.remove(light);
+        return this;
+    }
+
+    protected static __gshared LightParams _lightParamsBuffer;
+    @property protected LightParams * lights(Node3d node) {
+        if (!node.scene)
+            return null;
+        if (_lights.empty) {
+            if (node.scene.boundLights.empty)
+                return null;
+            return node.scene.boundLightsPtr;
+        }
+        if (node.scene.boundLights.empty) {
+            _lightParamsBuffer.reset();
+            _lightParamsBuffer.add(_lights);
+        } else {
+            _lightParamsBuffer.reset(node.scene.boundLights);
+            _lightParamsBuffer.add(_lights);
+        }
+        return &_lightParamsBuffer;
+    }
+
+    override void draw(Node3d node, bool wireframe) {
+        /// override it
+    }
+}
diff --git a/src/dlangui/graphics/scene/model.d b/src/dlangui/graphics/scene/model.d
index 075e058f..81047509 100644
--- a/src/dlangui/graphics/scene/model.d
+++ b/src/dlangui/graphics/scene/model.d
@@ -5,7 +5,7 @@ static if (ENABLE_OPENGL):
 
 import dlangui.graphics.scene.drawableobject;
 
-class Model : DrawableObject {
+class Model : MaterialDrawableObject {
     import dlangui.graphics.scene.mesh;
     import dlangui.graphics.scene.node;
     import dlangui.graphics.scene.material;
@@ -13,54 +13,18 @@ class Model : DrawableObject {
 
 
 
-    protected MaterialRef _material;
     protected MeshRef _mesh;
-    protected bool _autobindLights = true;
-    protected Lights _lights;
 
     this() {
     }
 
     this(Material material, Mesh mesh) {
-        _material = material;
+        super(material);
         _mesh = mesh;
     }
 
-    @property ref MaterialRef material() { return _material; }
     @property ref MeshRef mesh() { return _mesh; }
 
-    @property bool autobindLights() { return _autobindLights; }
-    @property Model autobindLights(bool flg) { _autobindLights = flg; return this; }
-
-    Model bindLight(Light light) {
-        _lights.add(light);
-        return this;
-    }
-
-    Model unbindLight(Light light) {
-        _lights.remove(light);
-        return this;
-    }
-
-    protected static __gshared LightParams _lightParamsBuffer;
-    @property protected LightParams * lights(Node3d node) {
-        if (!node.scene)
-            return null;
-        if (_lights.empty) {
-            if (node.scene.boundLights.empty)
-                return null;
-            return node.scene.boundLightsPtr;
-        }
-        if (node.scene.boundLights.empty) {
-            _lightParamsBuffer.reset();
-            _lightParamsBuffer.add(_lights);
-        } else {
-            _lightParamsBuffer.reset(node.scene.boundLights);
-            _lightParamsBuffer.add(_lights);
-        }
-        return &_lightParamsBuffer;
-    }
-
     override void draw(Node3d node, bool wireframe) {
         /// override it
         _material.bind(node, _mesh, lights(node));