Does Spoke and Hub support any compressed texture format (yet) like KTX2?

[Iaolia456]

Hi,

I'm starting the optimization phase of my project and I read about compressing texture in gltf file to be in KTX2 container. I found a command line tool calls gltf-transform the result file size looks promising. However, I can't import the result model to Spoke, I tried both etc1s and uastc flag but none of them work. It throw error Cannot read property 'uri' of undefined, which is pretty not quite helpful.

So, am I missing something? Or Hub just don't support compressed texture format yet?
Sorry, If I sound a bit newbie. I'm not a javascript guy I have limited knowledge about js and anything web-based.

Thanks

[rawnsley]

Yes, you can use textures with the BASISU GLTF extension.

[Iaolia456]

I have tried gltf-transform I believe it implement based-on that extension (there is a mention in that readme) but the resulted glb cannot be imported to Spoke. I also try gltfpack but that one throws unable to encode warning on all of the texture in the file. I'm finding other glb to try just in case maybe because of my glb file having issue.

[rawnsley]

It looks like Spoke isn't supporting BASISU at the moment. These two example models both load in Hubs, but I get errors when I drag them into Spoke.

[Iaolia456]

Ah... Ok then I guess no compressed texture format for now then?