Jeremy Reizenstein

1. I suggest not using unproject_points for back projection. It is complicated. The function [get_rgbd_point_cloud](https://github.com/facebookresearch/pytorch3d/blob/main/pytorch3d/implicitron/tools/point_cloud_utils.py#L23) is the friendly interface for backprojecting rgbd data through a camera. 2. The friendly way...

I can't see the image. Mesh Rendering in PyTorch3D doesn't model shadows, the effect must be from elsewhere, e.g. lighting or texture.

What is meant by "calculate the normal again"? The normals depend only on the verts and faces of the mesh - they are not related to the texture, the light...

Could it be that our function `load_obj` is being called with `create_texture_atlas=True` on an obj file with no texture data? What do you get if you call it with `create_texture_atlas=False`...

PyTorch3D does not have built-in support for reading a texture image together with a ply file. Are there UV coordinates stored in the ply file itself? Are there other tools...

Great! I'll say the same here as I said there: If you have a freely-licensed example of such data (or you want to create a synthetic test data file) then...

I think the problem here may be a gotcha with paths. Are you installing with `-e/--editable` on `pip install`? I think you might not be. That means there are two...

PyTorch3D version 0.2.5 is very old. Volumes probably did not exist in that version.

I think something might be wrong with paths. Could have a directory called pytorch3d somewhere on your PYTHONPATH or in your working directory which isn't the pytorch3d install? (e.g. containing...

I'm afraid lots of pytorch3d ops are not written to be compatible with vmap. In https://github.com/facebookresearch/pytorch3d/issues/1533 you can see an example of how you might wrap a function to combine...