vtkOBJImporter can handle obj file including components share same material.
I use vtkOBJImporter's example code (https://lorensen.github.io/VTKExamples/site/Cxx/IO/OBJImporter/) to read an obj file including several parts (the file is from shapenet https://www.shapenet.org/ https://www.shapenet.org/ ) But it can only show part of it. I also try to use paraview, but get the same results.
It seems because the obj have multiple components and these components share a limited number of materials. And the importer can't handle this situation. I a attach a model for the test.models.zip
Thanks!
Edited by maskjp