diff --git a/dlangui-monod-linux.dproj b/dlangui-monod-linux.dproj
index a7a4b57a..029f98f1 100644
--- a/dlangui-monod-linux.dproj
+++ b/dlangui-monod-linux.dproj
@@ -284,6 +284,7 @@
     <Compile Include="src\dlangui\graphics\scene\camera.d" />
     <Compile Include="src\dlangui\graphics\scene\drawableobject.d" />
     <Compile Include="src\dlangui\graphics\scene\effect.d" />
+    <Compile Include="src\dlangui\graphics\scene\light.d" />
     <Compile Include="src\dlangui\graphics\scene\material.d" />
     <Compile Include="src\dlangui\graphics\scene\mesh.d" />
     <Compile Include="src\dlangui\graphics\scene\model.d" />
diff --git a/dlangui-monod-osx.dproj b/dlangui-monod-osx.dproj
index dfd82c8a..6c1521e3 100644
--- a/dlangui-monod-osx.dproj
+++ b/dlangui-monod-osx.dproj
@@ -143,6 +143,7 @@
     <Compile Include="src\dlangui\graphics\scene\camera.d" />
     <Compile Include="src\dlangui\graphics\scene\drawableobject.d" />
     <Compile Include="src\dlangui\graphics\scene\effect.d" />
+    <Compile Include="src\dlangui\graphics\scene\light.d" />
     <Compile Include="src\dlangui\graphics\scene\material.d" />
     <Compile Include="src\dlangui\graphics\scene\mesh.d" />
     <Compile Include="src\dlangui\graphics\scene\model.d" />
diff --git a/dlangui-msvc.visualdproj b/dlangui-msvc.visualdproj
index fef32695..2f03e1b7 100644
--- a/dlangui-msvc.visualdproj
+++ b/dlangui-msvc.visualdproj
@@ -775,6 +775,7 @@
       <File path="src\dlangui\graphics\scene\camera.d" />
       <File path="src\dlangui\graphics\scene\drawableobject.d" />
       <File path="src\dlangui\graphics\scene\effect.d" />
+      <File path="src\dlangui\graphics\scene\light.d" />
       <File path="src\dlangui\graphics\scene\material.d" />
       <File path="src\dlangui\graphics\scene\mesh.d" />
       <File path="src\dlangui\graphics\scene\model.d" />
diff --git a/examples/d3d/src/d3d.d b/examples/d3d/src/d3d.d
index 8fd38ce8..5ca52f2b 100644
--- a/examples/d3d/src/d3d.d
+++ b/examples/d3d/src/d3d.d
@@ -138,7 +138,7 @@ class UiWidget : VerticalLayout, CellVisitor {
         string src = loadTextResource("suzanne.obj");
         importer.parse(src);
         Log.d("suzanne mesh:", importer.mesh.dumpVertexes(20));
-        Material suzanneMaterial = new Material(EffectId("colored.vert", "colored.frag", null), null);
+        Material suzanneMaterial = new Material(EffectId("colored.vert", "colored.frag", null), "DIRECTIONAL_LIGHT_COUNT 1");
         Model suzanneDrawable = new Model(suzanneMaterial, importer.mesh);
         Node3d suzanneNode = new Node3d("suzanne", suzanneDrawable);
         //suzanneNode.translate(vec3(3, 4, 5));
diff --git a/src/dlangui/graphics/scene/effect.d b/src/dlangui/graphics/scene/effect.d
index 816f1d3d..7fdc0a03 100644
--- a/src/dlangui/graphics/scene/effect.d
+++ b/src/dlangui/graphics/scene/effect.d
@@ -16,6 +16,7 @@ alias EffectRef = Ref!Effect;
 class Effect : GLProgram {
     EffectId _id;
     string[string] _defs;
+    string _defText;
 
     @property ref const(EffectId) id() const { return _id; }
     this(EffectId id) {
@@ -35,13 +36,21 @@ class Effect : GLProgram {
         // parse defs
         import std.array : split;
         string[] defs = _id.definitions.split(";");
+        char[] buf;
         foreach(def; defs) {
             assert(def.length > 0);
             string[] items = def.split(" ");
             if (items.length > 0) {
-                _defs[items[0]] = items.length > 1 ? items[1] : "";
+                string value = items.length > 1 ? items[1] : "";
+                _defs[items[0]] = value;
+                buf ~= "#define ";
+                buf ~= items[0];
+                buf ~= " ";
+                buf ~= value;
+                buf ~= "\n";
             }
         }
+        _defText = buf.dup;
         // compile shaders
         if (!check()) {
             Log.e("Failed to compile shaders ", _id.vertexShaderName, " ", _id.fragmentShaderName, " ", _id.definitions);
@@ -50,8 +59,8 @@ class Effect : GLProgram {
     }
 
     protected string preProcessSource(string src) {
-        // TODO: preprocess source code
-        return src;
+        // prepend definitions
+        return _defText ~ src;
     }
 
     protected string loadVertexSource(string resourceId) {
diff --git a/src/dlangui/graphics/scene/light.d b/src/dlangui/graphics/scene/light.d
new file mode 100644
index 00000000..d4c9f2b6
--- /dev/null
+++ b/src/dlangui/graphics/scene/light.d
@@ -0,0 +1,31 @@
+module dlangui.graphics.scene.light;
+
+import dlangui.core.math3d;
+import dlangui.core.types;
+
+enum LightType : ubyte {
+    directional,
+    point,
+    spot
+}
+
+/// Reference counted Light object
+alias LightRef = Ref!Light;
+
+class Light  : RefCountedObject {
+    protected vec3 _color;
+    protected this(vec3 color) {}
+    @property vec3 color() { return _color; }
+    @property Light color(vec3 c) { _color = c; return this; }
+    @property LightType type() { return LightType.directional; }
+    /// create new directional light
+    static Light createDirectional(vec3 color) {
+        return new DirectionalLight(color);
+    }
+}
+
+protected class DirectionalLight : Light {
+    protected this(vec3 color) {
+        super(color);
+    }
+}
diff --git a/src/dlangui/graphics/scene/node.d b/src/dlangui/graphics/scene/node.d
index 40646f06..5ce43dba 100644
--- a/src/dlangui/graphics/scene/node.d
+++ b/src/dlangui/graphics/scene/node.d
@@ -6,6 +6,7 @@ import dlangui.graphics.scene.transform;
 import dlangui.core.collections;
 import dlangui.graphics.scene.scene3d;
 import dlangui.graphics.scene.drawableobject;
+import dlangui.graphics.scene.light;
 
 /// 3D scene node
 class Node3d : Transform {
@@ -14,6 +15,7 @@ class Node3d : Transform {
     protected string _id;
     protected bool _visible = true;
     protected DrawableObjectRef _drawable;
+    protected LightRef _light;
 
     protected mat4 _worldMatrix;
 
@@ -36,6 +38,9 @@ class Node3d : Transform {
     /// drawable attached to node
     @property ref DrawableObjectRef drawable() { return _drawable; }
 
+    /// light attached to node
+    @property ref LightRef light() { return _light; }
+
     /// returns scene for node
     @property Scene3d scene() { 
         if (_scene)