/// <summary>
/// Render this layer's target. This is called immediately after all the Renderables
/// have been rendered, and immediately before PostRender.
/// </summary>
protected override void RenderLayerTarget()
{
rp.UnlockMatrix();
rp.UnsetRenderTarget();
rp.ClearRenderProperties();
rp.SetRenderProperties(
SpriteSortMode.Immediate,
BlendState.AlphaBlend,
m: TargetToScreenTransform);
rp.Render(LayerTarget, Vector2.Zero);
rp.ClearRenderProperties();
}