USDZ - Normal and Roughness maps imported as 'sRGB' instead 'Non Color' #108005

New Issue

Markus Lanxinger · 2023-05-17T10:56:40+02:00

Markus Lanxinger commented

2023-05-17 10:56:40 +02:00

System Information
Operating system: Windows 11
Graphics card: RTX 3090

Blender Version
Broken: (3.60, 6daa3f6b8a)
Worked: NA

Short description of error

When importing a sample USDZ file it imports correctly but has no Occlusion applied on the shader. When exporting back out to USDZ the Occlusion map is not included inside the USDZ anymore.

When checking the original file (extract the usdz via a 7zip) it does have the AO texture inside the directory.

Exact steps for others to reproduce the error

Download sample USDZ file from Apple: https://developer.apple.com/ar/photogrammetry/Rock.usdz
Import USDZ into Blender
Go to Shading Tab
See the Normal Map Shader Color Space set to sRGB

System Information Operating system: Windows 11 Graphics card: RTX 3090 Blender Version Broken: (3.60, 6daa3f6b8a) Worked: NA Short description of error When importing a sample USDZ file it imports correctly but has no Occlusion applied on the shader. When exporting back out to USDZ the Occlusion map is not included inside the USDZ anymore. When checking the original file (extract the usdz via a 7zip) it does have the AO texture inside the directory. Exact steps for others to reproduce the error 1) Download sample USDZ file from Apple: https://developer.apple.com/ar/photogrammetry/Rock.usdz 2) Import USDZ into Blender 3) Go to Shading Tab 4) See the Normal Map Shader Color Space set to sRGB

Rock.usdz

12 MiB

Rock.blend

10 MiB

Corrected_Normal_Map.png

2.5 MiB

Wrong_Normal_Map.png

2.5 MiB

Markus Lanxinger added the

labels 2023-05-17 10:56:40 +02:00

Markus Lanxinger commented

2023-05-17 11:35:48 +02:00

I guess this is related to this ticket:

#93904

I guess this is related to this ticket: https://projects.blender.org/blender/blender/issues/93904

YimingWu commented

2023-05-17 13:16:21 +02:00

cc @makowalski as well

We probably want to fix this as normal map images never really uses any color space, but rather just data.

/* Set texture color space.
   * TODO(makowalski): For now, just checking for RAW color space,
   * assuming sRGB otherwise, but more complex logic might be
   * required if the color space is "auto". */

  pxr::TfToken color_space = get_source_color_space(usd_shader);

cc @makowalski as well We probably want to fix this as normal map images never really uses any color space, but rather just data. ``` /* Set texture color space. * TODO(makowalski): For now, just checking for RAW color space, * assuming sRGB otherwise, but more complex logic might be * required if the color space is "auto". */ pxr::TfToken color_space = get_source_color_space(usd_shader); ```

YimingWu added the

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USDZ - Normal and Roughness maps imported as 'sRGB' instead 'Non Color' #108005