public ProceduralTextureStack(string _name, ProceduralTextureStackCreationParams creationParams)
 {
     name = _name;
     creationParams.borderSize = borderSize;
     creationParams.Validate();
     requests = new ProceduralRequestList(creationParams, this);
     handle   = ProceduralVirtualTexturing.Create(creationParams);
 }