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Or just use the standard BCn or DXT formats. The compression in these as texture formats is way smarter (for example, additional bits are used to encode green which our eyes are more sensitive to). These are "lossy" formats but when you go from PNG or something to a u8 format, you get artifacts for sure.

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Additional bits for green is hardly "way smarter". It is old hat, expressed in representations like the ancient "RGB 565" format.

Yes but it also palettizes per-block and it's not something the r8g8b8a8unorm format provides.

Regardless of it being older, why isn't it way smarter?

Follow up question, why are you so snarky?

Please don't use those DXTn formats; they're still legally toxic due to patents.

Not since last October. https://www.phoronix.com/scan.php?page=news_item&px=S3TC-For...

Even if they were "legally toxic" (which thankfully someone else took the trouble to disprove), you're making religious statements in a world where people use things for practical reasons. Pretty much every game engine in existence has DXT support, and I'd loooove to hear about how many got in trouble for these toxic patents.

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