protected TexturedRenderable(TexturedRenderable old)
     : base(old)
 {
     this.AssetName = old.AssetName;
     this.Source = old.Source;
     this.texture = old.texture;
 }
 protected TexturedRenderable(TexturedRenderable old)
     : base(old)
 {
     this.AssetName = old.AssetName;
     this.Source    = old.Source;
     this.texture   = old.texture;
 }