diff --git a/src/dlangui/graphics/scene/camera.d b/src/dlangui/graphics/scene/camera.d
index 90944b76..b6a16751 100644
--- a/src/dlangui/graphics/scene/camera.d
+++ b/src/dlangui/graphics/scene/camera.d
@@ -9,25 +9,61 @@ import gl3n.math;
 class Camera : Node3d {
 
     protected mat4 _projectionMatrix;
+    protected mat4 _viewProjectionMatrix;
+    protected bool _dirtyViewProjection;
+
+    protected bool _enabled;
+
+    this() {
+        _enabled = true;
+        setPerspective(4.0f, 3.0f, 45.0f, 0.1f, 100.0f);
+    }
+
+    /// returns true if camera is active (enabled)
+    @property bool enabled() { return _enabled; }
+
+    /// activates / deactivates camera
+    @property void enabled(bool v) { 
+        if (scene)
+            scene.activeCamera = null;
+        _enabled = v; 
+    }
 
     /// get projection matrix
-    @property ref mat4 projectionMatrix() {
+    @property ref const(mat4) projectionMatrix() {
         return _projectionMatrix;
     }
 
     /// set custom projection matrix
     @property void projectionMatrix(mat4 v) {
         _projectionMatrix = v;
+        _dirtyViewProjection = true;
+    }
+
+    /// get projection*view matrix
+    @property ref const(mat4) viewProjectionMatrix() {
+        if (_dirtyTransform || _dirtyViewProjection) {
+            _viewProjectionMatrix = _projectionMatrix * matrix;
+            _dirtyViewProjection = false;
+        }
+        return _viewProjectionMatrix;
     }
 
     /// set orthographic projection
     void setOrtho(float left, float right, float bottom, float top, float near, float far) {
         _projectionMatrix = mat4.orthographic(left, right, bottom, top, near, far);
+        _dirtyViewProjection = true;
     }
 
     /// set perspective projection
     void setPerspective(float width, float height, float fov, float near, float far) {
         _projectionMatrix = mat4.perspective(width, height, fov, near, far);
+        _dirtyViewProjection = true;
     }
 
+    ~this() {
+        // disconnect active camera
+        if (scene && scene.activeCamera is this)
+            scene.activeCamera = null;
+    }
 }
diff --git a/src/dlangui/graphics/scene/node.d b/src/dlangui/graphics/scene/node.d
index 71deed80..59b9823a 100644
--- a/src/dlangui/graphics/scene/node.d
+++ b/src/dlangui/graphics/scene/node.d
@@ -5,29 +5,50 @@ import gl3n.math;
 
 import dlangui.graphics.scene.transform;
 import dlangui.core.collections;
+import dlangui.graphics.scene.scene3d;
 
 /// 3D scene node
 class Node3d : Transform {
     protected Node3d _parent;
+    protected Scene3d _scene;
     protected string _id;
 
     protected mat4 _worldMatrix;
 
     protected ObjectList!Node3d _children;
 
+    this() {
+        super();
+    }
+
+    /// returns scene for node
+    @property Scene3d scene() { 
+        if (_scene)
+            return _scene;
+        if (_parent)
+            return _parent.scene;
+        return cast(Scene3d) this; 
+    }
+
+    @property void scene(Scene3d v) { _scene = v; }
+
     /// returns child node count
     @property int childCount() {
         return _children.count;
     }
+
     /// returns child node by index
     Node3d child(int index) {
         return _children[index];
     }
+
     /// add child node
     void addChild(Node3d node) {
         _children.add(node);
         node.parent = this;
+        node.scene = scene;
     }
+
     /// removes and destroys child node by index
     void removeChild(int index) {
         destroy(_children.remove(index));
@@ -37,6 +58,7 @@ class Node3d : Transform {
     @property Node3d parent() {
         return _parent;
     }
+
     @property Node3d parent(Node3d v) {
         _parent = v;
         return this;
diff --git a/src/dlangui/graphics/scene/scene3d.d b/src/dlangui/graphics/scene/scene3d.d
index ce45022d..d64117d1 100644
--- a/src/dlangui/graphics/scene/scene3d.d
+++ b/src/dlangui/graphics/scene/scene3d.d
@@ -1,6 +1,7 @@
 module dlangui.graphics.scene.scene3d;
 
 import dlangui.graphics.scene.node;
+import dlangui.graphics.scene.camera;
 
 import gl3n.linalg;
 import gl3n.math;
@@ -9,9 +10,35 @@ import gl3n.math;
 class Scene3d : Node3d {
 
     protected vec3 _ambientColor;
+    protected Camera _activeCamera;
+
+    /// ambient light color
     @property vec3 ambientColor() { return _ambientColor; }
+    /// set ambient light color
     @property void ambientColor(const ref vec3 v) { _ambientColor = v; }
 
 
+    /// active camera
+    @property Camera activeCamera() {
+        if (_activeCamera)
+            return _activeCamera;
+        // TODO: find camera in child nodes
+        return null;
+    }
+    /// set or clear current active camera
+    @property void activeCamera(Camera cam) {
+        _activeCamera = cam;
+    }
+
+    /// returns scene for node
+    override @property Scene3d scene() { 
+        return this; 
+    }
+
+    override @property void scene(Scene3d v) { 
+        //ignore
+    }
+
 }
 
+
diff --git a/src/dlangui/graphics/scene/transform.d b/src/dlangui/graphics/scene/transform.d
index 742b42c0..59e233f3 100644
--- a/src/dlangui/graphics/scene/transform.d
+++ b/src/dlangui/graphics/scene/transform.d
@@ -12,6 +12,10 @@ class Transform {
 
     protected mat4 _matrix;
 
+    this() {
+        setIdentity();
+    }
+
     /// get scale vector
     public @property ref const(vec3) scaling() const { return _scale; }
     /// get scale X