Open3d: 3D Model (.obj) texture not loading correctly.

[nickponline]

When I load this model in other software it appears correctly as this:

But with Open3D the texture is all messaged up:

Here is the code I'm using:

import open3d as o3d

def visualize(mesh):
    vis = o3d.visualization.Visualizer()
    vis.create_window()
    vis.add_geometry(mesh)
    vis.run()
    vis.destroy_window()

def main():
    mesh = o3d.io.read_triangle_mesh("scene_mesh_decimated_textured.obj")
    visualize(mesh)

main()

And here is the model and texture:
https://www.dropbox.com/s/xm0sun3hoijwbjf/Archive.zip?dl=0

[nickponline]

Cross-posted to stack overflow with a bounty if anyone wants that 🏆
https://stackoverflow.com/questions/60104854/how-to-your-load-3d-model-obj-in-open3d

[syncle]

The obj file you shared the multiple materials (8 texture maps and materials). I think the following line would affect the issue
https://github.com/intel-isl/Open3D/blob/44a35978e78cf68a8368b90b173927ff0e0ef960/src/Open3D/IO/FileFormat/FileOBJ.cpp#L148-L157
@theNded Is this related to the fact that the textured mesh only can store a single texture map?
I also presume the issue comes from an inaccurate decoding UV coordinate.

[theNded]

The obj file you shared the multiple materials (8 texture maps and materials). I think the following line would affect the issue
https://github.com/intel-isl/Open3D/blob/44a35978e78cf68a8368b90b173927ff0e0ef960/src/Open3D/IO/FileFormat/FileOBJ.cpp#L148-L157

@theNded Is this related to the fact that the textured mesh only can store a single texture map?
I also presume the issue comes from an inaccurate decoding UV coordinate.

I see. This is due to the legacy architecture design
https://github.com/intel-isl/Open3D/blob/master/src/Open3D/IO/ClassIO/TriangleMeshIO.cpp#L75-L84
where only one mesh is supported for IO. It would be non-trivial to change the interface, but I will try to see if we can find a workaround.

[germanros1987]

It seems that Wei will be the champion for this task. Thanks Wei!

[nickponline]

Awesome thanks for looking into this @theNded. Let me know if I can help

[theNded]

@nickponline can you please check the latest version?

[nickponline]

@theNded this works well, except I'm not sure if there is a way to crop them, is there a way to do that?
Thank you so much!

[nickponline]

I think that might have been a pre-existing limitation on Open3D, so might not be related.

[syncle]

Closing this since the main issue was addressed. @nickponline: Please open a new one if needed.

[ArlenisChS]

Hi,
I’m working with the Python version Open3D 0.10.0.1. Using MeshLab my example mesh is showed like this

But when I load and display the mesh with Open3D the window goes blank

My code goes like this:

mesh = o3d.io.read_triangle_mesh(“path/to/mesh”) o3d.visualization.draw_geometries([mesh])

I can’t tell if I’m doing something wrong or if it is an issue. Can you please help me??!!!

I’m gonna let this link below in case you wanna test it

https://drive.google.com/drive/folders/1Ik2Blbkhm3w8fTeXxw_3gBKoeg4iBncS?usp=sharing

[Jianghanxiao]

I think this may not be a blank window, but the mesh is all white, you can try assigning a different color for the mesh. mesh.paint_uniform_color([0.5, 0.5, 0.5]. Then see what happens @ArlenisChS

[ArlenisChS]

I think this may not be a blank window, but the mesh is all white, you can try assigning a different color for the mesh. mesh.paint_uniform_color([0.5, 0.5, 0.5]. Then see what happens @ArlenisChS

Oh yes, sorry for not putting what was happening. I was painting the mesh with MeshLab and when saving it into a .ply the color seem to be set to white. It seems like I needed to save the mesh activating some flags, wish I did it and now it works. Thanks for the help!! 🤗

[ttsesm]

Hi,

I am trying to load the attached .obj and corresponding .mtl files. However, I am getting the following warning message:

[Open3D WARNING] Read OBJ failed: Both `d` and `Tr` parameters defined for "m15". Use the value of `d` for dissolve (line 88 in .mtl.)
Both `d` and `Tr` parameters defined for "m17". Use the value of `d` for dissolve (line 103 in .mtl.)
Both `d` and `Tr` parameters defined for "m19". Use the value of `d` for dissolve (line 118 in .mtl.)


Process finished with exit code 139 (interrupted by signal 11: SIGSEGV)

Then I've manually removed the Tr values but it still segfaults without any output error.

Any idea what could be wrong?
The code I am using is the following:

    os.chdir("./model/house/0004d52d1aeeb8ae6de39d6bd993e992/")
    mesh = o3d.io.read_triangle_mesh("./house_room2.obj",print_progress = True)
    o3d.visualization.draw_geometries([mesh])

model.zip