Is there some possibility to support `from_trimesh()` like what pyrender do?

**Is your feature request related to a problem? Please describe.**
Currently, the textures cannot be loaded successfully with obj with .mtl file in some cases. I try loading in trimesh and pyrender, they work well. However, for open3d, the texture cannot be successfully loaded

**Describe the solution you'd like**
Is it possible to offer function from_trimesh(*) like what pyrender does. Maybe the core problem is not for this function. But if we can finally offer something like this, it will be very convenient. I'm not sure if it will make things easier to involve some internal representation from other library.

**Additional context**
And one question, do you have some idea on how to convert the texture or material in other library to vertex color which can be directly used in open3d