ArnoldUSD Exported USD/USDA does not package well with USDZip

Describe the bug When you run ArnoldUSD export from Maya, the USD contents will use string instead of asset for inputs:filename. The result is that when running USDZip, your files don’t get packaged when they should.

def Shader "file3"
{
    uniform token info:id = "arnold:image"
    string inputs:color_space = "sRGB"
    string inputs:filename = "D:/images/someimage.png"
    bool inputs:ignore_missing_textures = 1
    color4f inputs:missing_texture_color = (0.5, 0.5, 0.5, 0)
    string inputs:name = "file3"
    color4f outputs:out
}

that string should be

       asset inputs:filename = @D:/images/someimage.png@

Steps to reproduce the behavior:

1. Create a shader, attach a texture to it
2. Export from ArnoldUSD In Maya
3. Run USDZip -a {import-path}.usda {export-path}.usdz
4. List the contents of the USDZ (usdzip -l). The usdz will not reference any of the linked textures that we were expecting.

Expected behavior

1. If you change the string -> asset in a usda file, and run step 3. It’ll package all the textures properly and when running usdzip -l will show all of them in the usdzip

Not Working (string inputs:filename):

>usdzip -a D:\scenes\export-with-strings.usda D:\scenes\export-with-strings.usdz

>usdzip -l D:\Scenes\export-with-strings.usdz
scenes/export-with-strings.usda

– vs – Working (asset inputs:filename)

>usdzip -a D:\scenes\export-with-assets.usda D:\scenes\export-with-assets.usdz
>usdzip -l D:\Scenes\export-with-assets.usdz
scenes/export-with-assets.usda
scenes/15/projection1-BP_001__backplate.png
scenes/15/projection2-BP_002__backplate.png
scenes/15/projection1-BP_003__backplate.png
scenes/15/projection4-BP_004a__backplate.png
scenes/15/projection5-BP_004b__backplate.png
scenes/15/projection6-BP_004c__backplate.png
scenes/15/projection7-BP_004d__backplate.png
scenes/15/projection8-BP_005__backplate.png
scenes/15/projection9-BP_006__backplate.png
scenes/15/projection10-BP_007__backplate.png
scenes/15/projection11-BP_008__backplate.png
scenes/15/projection12-BP_009__backplate.png
scenes/15/projection13-BP_010__backplate.png
scenes/15/projection14-BP_011__backplate.png
.....

Used Software Versions

[sebastienblor]

Right, we do know that these tokens are frequently used, from the debug scenes we receive from customers. So it’s something we must keep supporting. I created #1163 for that. We also had a ticket for a custom file resolver, which could perhaps also help. Cheers

[asutermo]

Right, we do know that these tokens are frequently used, from the debug scenes we receive from customers. So it’s something we must keep supporting. I created #1163 for that. We also had a ticket for a custom file resolver, which could perhaps also help. Cheers

Awesome, glad to see this is still being considered.