How to save/export color data while exporting 3d geometry file. (obj)

For example, when I apply a tube filter on my stream tracer it shows something like this.

And now when I export it to obj (because Unity supports it) The color data is lost and I just see grayscale obj. So can we export its texture and .mtl as well? along with.obj file. If there is some other way to achieve my desired output (exporting it as is in Unity) that would be really helpful.

What you want to do is export the scene. However, the OBJ exporter available in VTK is not exposed in ParaView - not sure why, but it probably should be. I have opened an issue: