I've been working on generating a KTX format cubemap using the xcrun realitytool image --generate-cube-map command, but I'm encountering an issue with the file size. The cubemap file ends up being around 128 MB（2k）, which is too large for my needs. I'm hoping to get some advice on a few points:
Is there any way to reduce the file size of the KTX cubemap generated with this command? I’d appreciate any tips on compression settings or alternative approaches that could help shrink the file size while retaining good quality.
Is there any documentation available for this command? I've been exploring on my own, but a comprehensive guide would be helpful.
Are there alternative methods for converting textures to the KTX format? If anyone has experience with other tools or workflows that work well for this, please share!