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[FIX] Fix metalness and roughness handling in UsdzExporter #8248

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Merged
willeastcott merged 1 commit into from
Dec 14, 2025
Merged

[FIX] Fix metalness and roughness handling in UsdzExporter #8248

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10 changes: 8 additions & 2 deletions src/extras/exporters/usdz-exporter.js
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Original file line number Diff line number Diff line change
Expand Up @@ -438,8 +438,14 @@ class UsdzExporter extends CoreExporter {
addTexture('normalMap', null, 'normal3f', 'normal', 'normal');
addTexture('emissiveMap', material.emissive, 'color3f', 'emissiveColor', 'emissive', false, true);
addTexture('aoMap', null, 'float', 'occlusion', 'occlusion');
addTexture('metalnessMap', material.metalness, 'float', 'metallic', 'metallic');
addTexture('glossMap', material.gloss, 'float', 'roughness', 'roughness');

// only export metalness for metalness workflow materials
const metalness = material.useMetalness ? material.metalness : 0;
addTexture('metalnessMap', metalness, 'float', 'metallic', 'metallic');

// convert gloss to roughness (they are inverse of each other)
const roughness = material.glossInvert ? material.gloss : 1 - material.gloss;
addTexture('glossMap', roughness, 'float', 'roughness', 'roughness');

// main material object
const materialObject = `
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