protected override void OnRendering(IHostScreen screen, ref FBO currentFbo)
{
currentFbo = _gBuffer.FBO;
FBO.Bind(currentFbo, FBO.Target.FrameBuffer);
ElffyGL.Clear(ClearMask.ColorBufferBit | ClearMask.DepthBufferBit);
_gBuffer.ClearColorBuffers();
}