Replace a texture by a new one

[Makio64]

How to replace a texture by another one, for example replace an image texture by an uastc texture in all the model?
Should we use setImage / setExtension / setMimeType on the current one ?

[donmccurdy]

Yes, you can use any of the methods found in the Texture class. If you're not changing the format of the image, then .setImage(...) with the new image (Buffer or Uint8Array) is enough. If the format changes then updating the URI and MIME type would also be required. When using texture formats that require a glTF extension, like KTX2, WebP, or AVIF, you'll need to register and create the relevant extension as shown in:

https://gltf-transform.dev/modules/extensions/classes/KHRTextureBasisu

For example:

import { KHRTextureBasisu } from '@gltf-transform/extensions';

io.registerExtensions([KHRTextureBasisu]);

document.createExtension(KHRTextureBasisu).setRequired(true);

[Makio64]

Thanks it works perfectly with setImage and setMimeType + setRequired on the extension :)