Hello, thanks for the models.
The material structure of some models is completely destroyed or damaged, but the voxel is fine.
I have one last request if you have time.
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PS
I checked the case again, then I found a problem about textures type, If the model prepare with base color it will work after ripped. But if the model prepare with vertex paint, ripped result will be non-texture. Vertex paint while using base color will be non-texture. And also model material ID will collapse, and you cannot give material easily, you should reconstruct material ID of model.
P.S.
:) Sorry, I solved the problem.
Open the model with blender, and open shading window add vertex paint input and connect it to material base colour slot , after you should bake the vertex paint to make image texture. Actually I'm newbie to blender and I will give a tutrial link for vertex color to image texture
Thanks a lot .