Version: 7.51.1 and git master OS: any Browser: any Engine: any Desc In texture.serialize, if the texture contains _buffer as Uint8Array, commonly if loaded from a glb model, serializing texture will result in base64 url in image/png type. But in gltf spec , texture can be in many types, includi…

I think it’s a known issue with the glTF serializer, cc @alexchuber and @srzerbetto .

Thanks for the report! Yes, this is a known issue that I plan to investigate soon. I recall seeing your previous thread about this :slight_smile: (Sidenote, our serialize methods like the one in Texture are for our .babylon exporter, not .gltf)

[image] alexchuber: I recall seeing your previous thread about this :slight_smile: Hmmm, my previous threads are about gltf exporting, it changes name and content of the texture

Here’s a fix to address this case: glTF Loader: Get `mimeType` from URI if not defined master ← alexchuber:mimetype-from-url opened 01:10AM - 09 Apr 25 UTC (UTC) …

What is currently the best way to load a GLB with webp textures and export it with webp textures?

We’d need to add EXT_textures_webp support to the glTF exporter to do it correctly, or the best way. We already preserve imported webp images on export ( except in Safari and maybe Node). However, because we don’t add the extension to the glTF, it’s technically an invalid glTF. :confused: That said,…

Good news! Will it be possible in this case to load a GLB with PNG textures and export it with WEBP textures?

Not yet-- at least, not without some manual manipulation-- but I’m certainly open to the idea. That’d make a good export optimization option :slight_smile:

Here is how it done in GLTF-Transform - glTF-Transform/packages/functions/src/texture-compress.ts at main · donmccurdy/glTF-Transform · GitHub My Sandbox implementation - https://glb.babylonpress.org/

Texture.serialize, hardcoded image/png for all mime types

Bugs

kzhsw March 10, 2025, 3:56am 5

Hmmm, my previous threads are about gltf exporting, it changes name and content of the texture

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Texture.serialize, hardcoded image/png for all mime types

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