Load gltf model and change texture to ktx

Hi, I’ve learn that large texture size cause slow down performance and it is critical for mobile. So right now I change texture resoulution low on loading model with LOD.

I feel it is working in mac but not in mobile. The textures goes black in some reason but I don’t know.

I’ll put link here

Anyway the main question is

it possible to change texture(png or jpg) to ktx(.basis) texture in web? And if can, Is that help full to increase performance despite the transforming texture time?

I don’t have ktx texture and also I think I can only use ktx texture that I converted in loading process(if i can make it)

I’m sad that I can’t save ktx texture in glb file.