Incorrect handling of images in GLTF exporter when Embed Textures is off

[MattiDragon]

What are you trying to do, and what do you expect to happen?

When I export a model to GLTF with Embed Textures disabled, I expect blockbench to output a valid GLTF file with something resonable as the uri field of the images.

What happens instead?

Blockbench creates an invalid GLTF file where images lack the uri field. This is because the code that sets the uri field ends up setting it to undefined because the canvas used as image in the three.js texture doesn't have a src attribute. I'm not sure where blockbench should get the uri from, but it should definatly exist in the file.

Model format in which the issue occurs

GLTF

Blockbench variant

Program

Blockbench version

v4.11.1

Operating System

Windows 11 Home

Installed Blockbench plugins

None