void ClearBuffers ( HdrFrame frame )
{
Game.GraphicsDevice.Clear( frame.DiffuseBuffer.Surface, Color4.Black );
Game.GraphicsDevice.Clear( frame.SpecularBuffer.Surface, Color4.Black );
Game.GraphicsDevice.Clear( frame.NormalMapBuffer.Surface, Color4.Black );
Game.GraphicsDevice.Clear( frame.ScatteringBuffer.Surface, Color4.Black );
Game.GraphicsDevice.Clear( frame.DepthBuffer.Surface, 1, 0 );
Game.GraphicsDevice.Clear( frame.HdrBuffer.Surface, Color4.Black );
}