I am uploading an .obj file into my Forge Viewer app, but when it loads in the viewer the material/textures are gone, leaving the model grey. How can I keep the materials/textures or what should I do to apply this the correct way?
Obj with MTL or PNG textures should be packaged in a zip file before uploading to OSS. Here is the reference: How to upload obj with mtl and textures to bucket?