[BUG] material.vis returns object of a class in a private model

[bernhard-42]

Description

pymat.vis._model.Vis which gets returned e.g. from stainless.vis looks like an internal implementation class

Steps to Reproduce

In [17]: from pymat import stainless

In [18]: stainless.vis
Out[18]: Vis(source='ambientcg', material_id='Metal012', tier='1k', finishes={'brushed': {'source': 'ambientcg', 'id': 'Metal012'}, 'polished': {'source': 'ambientcg', 'id': 'Metal049A'}, 'dirty': {'source': 'ambientcg', 'id': 'Metal049B'}}, roughness=0.3, metallic=1.0, base_color=(0.75, 0.75, 0.77, 1.0), ior=None, transmission=0.0, clearcoat=None, emissive=None)

In [19]: type(stainless.vis)
Out[19]: pymat.vis._model.Vis

In my code I now need to say

pbr: pymat.vis._model.Vis = stainless.vis

which looks like using an internal model not meant to be exposed.

Do I miss something?

Expected Behavior

I would expect Vis to be a clearly public class (now private model in the module path)

Actual Behavior

see above

Environment

any

Additional Context

No response

Possible Solution

No response

Changelog Category

Fixed