public override void preRender( Graphics graphics )
{
Core.graphicsDevice.setRenderTarget( _maskRenderTarget );
graphics.batcher.begin( BlendState.AlphaBlend, Core.defaultSamplerState, DepthStencilState.None, null );
graphics.batcher.draw( _maskTexture, _maskPosition, null, Color.White, _renderRotation, _maskOrigin, _renderScale, SpriteEffects.None, 0 );
graphics.batcher.end();
Core.graphicsDevice.setRenderTarget( null );
}