when assign scene.background a CubeTexture, there is an error occured:

TraitError: The 'background' trait of a Scene instance must be a valid HTML color, but a value of CubeTexture ...

and in pythreejs, cannot use the cubemap as the way in three.js. because the CubeTextureLoader in pythreejs has no methods like load etc. and I cannot find any reference about this part.

anyone can help?
thanks