Question about conversion from PNG to KTX2 and BC1-7 about basis_universal HOT 1 CLOSED

You're mixing up stuff here. BasisU is not a BCn compressor - but BCn is supported as a transcoding target. ZStandard compression is another compression step, on top of the texture compression that's done when going from input data to UASTC.

On the platform where you compress, the vastly simplified pipeline looks like this:

Input -> UASTC [-> Zstandard] -> { .ktx2 | .basis }

On the runtime platform, you simply transcode to whatever format is supported there. On desktop systems, like usual PCs and Macs, you got S3TC/DXTn and BCn (or BPTC + RGTC in OpenGL terms). On mobile, you mostly have ASTC etc.

I suggest you close this, because there isn't an issue here.

from basis_universal.