diff --git a/src/dlangui/graphics/glsupport.d b/src/dlangui/graphics/glsupport.d
index 74b6e9ca..41552487 100644
--- a/src/dlangui/graphics/glsupport.d
+++ b/src/dlangui/graphics/glsupport.d
@@ -19,18 +19,24 @@ Authors:   Vadim Lopatin, coolreader.org@gmail.com
 module dlangui.graphics.glsupport;
 
 public import dlangui.core.config;
-
 static if (ENABLE_OPENGL):
 
 public import dlangui.core.math3d;
-import dlangui.graphics.scene.mesh;
+
 import dlangui.core.logger;
-import derelict.opengl3.gl;
 import dlangui.core.types;
+
 import std.conv;
 import std.string;
 import std.array;
 
+public import derelict.opengl3.types;
+public import derelict.opengl3.gl3;
+public import derelict.opengl3.gl;
+
+import dlangui.graphics.scene.mesh;
+import dlangui.graphics.scene.effect;
+
 derelict.util.exception.ShouldThrow gl3MissingSymFunc( string symName ) {
     import std.algorithm : equal;
     foreach(s; ["glGetError", "glShaderSource", "glCompileShader",
@@ -112,7 +118,7 @@ string glerrorToString(in GLenum err) pure nothrow {
 }
 
 
-class GLProgram : GraphicsEffect {
+class GLProgram : dlangui.graphics.scene.effect.GraphicsEffect {
     @property abstract string vertexSource();
     @property abstract string fragmentSource();
     protected GLuint program;
diff --git a/src/dlangui/graphics/scene/effect.d b/src/dlangui/graphics/scene/effect.d
index 806f07b2..1b03491c 100644
--- a/src/dlangui/graphics/scene/effect.d
+++ b/src/dlangui/graphics/scene/effect.d
@@ -9,6 +9,22 @@ import dlangui.graphics.glsupport;
 import dlangui.graphics.gldrawbuf;
 import dlangui.graphics.scene.mesh;
 
+/// Base class for graphics effect / program - e.g. for OpenGL shader program
+abstract class GraphicsEffect : RefCountedObject {
+    /// get location for vertex attribute
+    int getVertexElementLocation(VertexElementType type);
+
+    void setUniform(string uniformName, mat4 matrix);
+
+    void setUniform(string uniformName, vec2 vec);
+
+    void setUniform(string uniformName, vec3 vec);
+
+    void setUniform(string uniformName, vec4 vec);
+
+    void draw(Mesh mesh);
+}
+
 /// Reference counted Effect object
 alias EffectRef = Ref!Effect;
 
diff --git a/src/dlangui/graphics/scene/mesh.d b/src/dlangui/graphics/scene/mesh.d
index fa74b03b..75200bc3 100644
--- a/src/dlangui/graphics/scene/mesh.d
+++ b/src/dlangui/graphics/scene/mesh.d
@@ -1,8 +1,9 @@
 module dlangui.graphics.scene.mesh;
 
-import dlangui.graphics.scene.material;
 import dlangui.core.math3d;
 import dlangui.core.types;
+//import dlangui.graphics.scene.material;
+import dlangui.graphics.scene.effect;
 
 /// Reference counted Mesh object
 alias MeshRef = Ref!Mesh;
@@ -46,22 +47,6 @@ class VertexBuffer {
 /// location for element is not found
 enum VERTEX_ELEMENT_NOT_FOUND = -1;
 
-/// Base class for graphics effect / program - e.g. for OpenGL shader program
-abstract class GraphicsEffect : RefCountedObject {
-    /// get location for vertex attribute
-    int getVertexElementLocation(VertexElementType type);
-
-    void setUniform(string uniformName, mat4 matrix);
-
-    void setUniform(string uniformName, vec2 vec);
-
-    void setUniform(string uniformName, vec3 vec);
-
-    void setUniform(string uniformName, vec4 vec);
-
-    void draw(Mesh mesh);
-}
-
 /// vertex attribute properties
 struct VertexElement {
     private VertexElementType _type;