private void DrawDepthMask()
{
GraphicsDevice.SetRenderTarget(RTDepthMask);
GraphicsDevice.Clear(new Color(0, 1f, 0, 1f));
spriteBatch.Begin(SpriteSortMode.Immediate, null, null, null, null, FXDepthMask, camera.get_transformation(GraphicsDevice));
drawBatch.DrawDepthMask(spriteBatch);
spriteBatch.End();
}