Could not load obj correctly. about neural_renderer

[nkolot]

I'm pretty sure that it has to do with the fact that the renderer currently does not support loading obj files containing vertex normals.

@hiroharu-kato do you think there is an easy way of fixing it?

[qilimk]

Thanks for replying so quickly, I tried to delete all vertex normals lines and its preview is still normal, but result from renderer is also no-changed. Do you think it is because there are too many groups in the obj file?

[nkolot]

Have you tried rendering the silhouette only? How do the results look like?

[nkolot]

I tried to render the silhouettes and they look correct. I also tried to renderer it using a uniform texture (ones everywhere) and it looks as it should do. I am seeing the same results as you. Can you try to run your examples with the original neural renderer? Do you get the same results?

[qilimk]

Sorry for ambiguous expression. I didn't render the silhouettes, and I think you are right that the renderer does not support the vertex normals, so I delete all the vertex normals lines and make a new obj file. The result is below.

Here is the new obj and mtl files.
The Preview(the Preview program on Mac, which uses OpenGL renderer) result is still different from rendering result.

[nkolot]

I tried to render it using different software, MacOS Preview, Meshlab and Cinema4D and I am seeing completely different visualization results in each one. This is really annoying, so I can't come up with an easy fix for that.

[qilimk]

Thanks so much, I may try some other solutions! If you have any new idea to solve this problem, could you let me know about it?

[czw0078]

It seems that those 3D software editors do not even have a consistency with each other on obj. file format. To solve this issue systematically, see this mini cooper again. Note the second line of raw file

# Exported from SketchUp, (c) 2000-2012 Trimble Navigation Limited

This 3d file is actually converted from .skp file to .obj by SketchUp. The 3D Warehouse (supported by the same company developing SketchUp) has a very large repo for all kinds of free 3d objects. Many researchers build 3d object databases by collecting models from 3D Warehouse.

So, I think perhaps we should try to make it compatible with .obj files converted from .skp files. ( Or even develop a new python code load_skp.py just like load_obj.py, directly reads out from .skp file. The .skp file format seems a little bit more human readable, but it is still a lot of work if decide to do it I guess.)