public void FreeRenderTarget(RenderTarget rt)
        {
            int id  = rt.Id.ToInt32();
            var rtw = ResourceIDs.Lookup[id] as RenderTargetWrapper;

            rtw.Target.Dispose();
            ResourceIDs.Free(rt.Id);
        }
 public void FreeTexture(Texture2d tex)
 {
     ResourceIDs.Free(tex.Id);
 }