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fix(editor): set GLTFExporter textureUtils for compressed-texture GLB export (Sentry EDITOR-DJ) #435

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fix(editor): set GLTFExporter textureUtils for compressed-texture GLB export (Sentry EDITOR-DJ) #435

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12 changes: 11 additions & 1 deletion packages/editor/src/components/editor/export-manager.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -7,9 +7,11 @@ import type { Mesh, Object3D } from 'three'
import { GLTFExporter } from 'three/examples/jsm/exporters/GLTFExporter.js'
import { OBJExporter } from 'three/examples/jsm/exporters/OBJExporter.js'
import { STLExporter } from 'three/examples/jsm/exporters/STLExporter.js'
import * as WebGLTextureUtils from 'three/examples/jsm/utils/WebGLTextureUtils.js'

export function ExportManager() {
const scene = useThree((state) => state.scene)
const gl = useThree((state) => state.gl)
const setExportScene = useViewer((state) => state.setExportScene)

useEffect(() => {
Expand Down Expand Up @@ -43,6 +45,14 @@ export function ExportManager() {
// Default: GLB export (existing behavior)
const exporter = new GLTFExporter()

// Compressed (KTX2/basis) textures must be decompressed during export.
// three r184's GLTFExporter requires textureUtils (backed by the active
// WebGLRenderer) or it throws "setTextureUtils() must be called".
exporter.setTextureUtils({
decompress: (texture, maxTextureSize) =>
WebGLTextureUtils.decompress(texture, maxTextureSize, gl),
})

@cursor cursor Bot Jun 22, 2026

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Wrong texture utils for WebGPU

High Severity

The GLB exporter is configured to use WebGLTextureUtils.decompress with the gl renderer. However, the Viewer uses WebGPURenderer, and WebGLTextureUtils is WebGL-specific. This mismatch can cause compressed (KTX2) textures to fail or mis-decompress during GLB export.

Fix in Cursor Fix in Web

Reviewed by Cursor Bugbot for commit 64b1c96. Configure here.


return new Promise<void>((resolve, reject) => {
exporter.parse(
exportScene,
Expand All @@ -65,7 +75,7 @@ export function ExportManager() {
return () => {
setExportScene(null)
}
}, [scene, setExportScene])
}, [scene, gl, setExportScene])

return null
}
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