void Render(IntPtr pParam)
{
// retrieving OpenGL texture
ICoreTexture pCoreTex;
pTex.GetCoreTexture(out pCoreTex);
IOpenGLTextureContainer pGLTex;
IBaseRenderObjectContainer pGLObj;
pCoreTex.GetBaseObject(out pGLObj);
pGLTex = (IOpenGLTextureContainer)pGLObj;
uint GLTex; // OpenGL texture Id
pGLTex.GetTexture(out GLTex);
Gl.glEnable(Gl.GL_LIGHTING);
Gl.glEnable(Gl.GL_LIGHT0);
Gl.glBindTexture(Gl.GL_TEXTURE_2D, GLTex);
Gl.glPushMatrix();
Gl.glTranslatef(0f, 0f, -1.5f);
Gl.glRotatef(uiCounter / 2f, 0.6f, 0.2f, 0.3f);
// We can also acess geometry buffer via pMesh->GetGeometryBuffer(p_geom_buff) and then p_geom_buff->GetBaseObject(...).
// But it is easier to use engine.
pMesh.Draw();
Gl.glPopMatrix();
Gl.glBindTexture(Gl.GL_TEXTURE_2D, 0);
Gl.glDisable(Gl.GL_LIGHTING);
Gl.glDisable(Gl.GL_LIGHT0);
// If you've corrupted engine pipeline somehow, you may want to invalidate state manager.
// And remember that IRender3D can also cache some states.
//pCoreRenderer->InvalidateStateFilter();
}