How to render vertex colors on the mesh model about blenderproc

[themasterlink]

Hey,

this is hard to tell, could you upload an example model somewhere, so that I can reproduce it?

Best,
Max

[themasterlink]

But to explain the warning, what happens is that your selector does not find any material which fits the name you selected.

There are now several possible reasons for that:

1. no material was loaded as the file does not have one
2. the material was loaded but the name is different
3. no material was loaded even though the material has one, sometimes happens with .ply files (blender-bug)

[ljs7619480]

Hi, @themasterlink

Thanks for your reply.
I fork your repository and upload my models at this branch.

Best Regards,
Jason

[themasterlink]

Hey,

as I suspected it is a combo of 1. and 2.:

In your mtl file:

https://github.com/ljs7619480/BlenderProc/blob/d89fada9a5d5c45365cf9b9d0f82c4ce66165399/examples/vertexCol/scene.mtl#L3

But in line 19748 of scene.obj:

usemtl se_0

This should have the same name as in your .mtl file:

usemtl scene_0

Best,
Max

[themasterlink]

Else you can change the name in your conditions to:

"conditions": {
    "name": "se.*"
}

[ljs7619480]

You are right, I change the filename before. It's named se.mtl & se.obj originally.
However, after I fix it, the render result of my model becomes the whole black.
First row is the result after I fixed the bug and the second row is the original output.

After that, I also try to use blender-gui to load this model in .obj format directly, and it also did not read the vertex colors in .obj file.
But it will read the vertex colors in the .ply file.

[ljs7619480]

I notice that you have fixed this issue in the Replica dataset, and then modified it to read my ply file.

    {
      "module": "loader.ReplicaLoader",
      "config": {
        "data_path" : "<args:1>",
        "data_set_name": "",
      }
    },
    {
      "module": "manipulators.MaterialManipulator",
      "config": {
        "selector": {
          "provider": "getter.Material",
          "conditions": {
            "name": "ReplicaMaterial"
          }
        },
        "cf_change_to_vertex_color": "Col"
      }
    },

Best Regards,
Jason

[themasterlink]

Oh yeah I forgot that .obj can not store vertix colors. So you have to use .ply.

I am glad it works now.

[ljs7619480]

Hi @themasterlink,

Thanks for your helping I find out the solution.
I use ReplicaLoader, and rendering the vertex colors successfully.

However, the module is all wrapped, and It is a little workaround to use that module to load the "non" replica dataset objects.
Does (General) "objectLoader" currently support loading the vertex colors and name it by given argument? The parameters of objectLoader seem to do not support this function.

BRs,
Jason