if (device->isWindowActive())
	{
		driver->beginScene(true, true, 0);

		if (rt)
		{
			// draw scene into render target
			
			// set render target texture
			driver->setRenderTarget(rt, true, true, video::SColor(0,0,0,255));     

			// make cube invisible and set fixed camera as active camera
			

			// draw whole scene into render buffer
			smgr->drawAll();                 

			// set back old render target
	  

			driver->setRenderTarget(rttwo, true, true, video::SColor(0,0,0,255));     

			// make cube invisible and set fixed camera as active camera
			

			// draw whole scene into render buffer
			smgr->drawAll();                 

			// set back old render target
			driver->setRenderTarget(0);      
  			 

			// make the cube visible and set the user controlled camera as active one
			test->setVisible(true);
			smgr->setActiveCamera(fpsCamera);
		}
		
		// draw scene normally
		smgr->drawAll(); 
		env->drawAll();

		driver->endScene();
	}