As far as I can tell, ASTC doesn’t use BC7-style pbits. Instead it has various new tricks for encoding endpoint colors. pbits (where endpoint components share the same LSB) are quite effective if used correctly.
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ASTC’s partition patterns are ugly:https://www.google.com/amp/s/rockets2000.wordpress.com/2018/01/09/astc-partitions/amp/ …
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Replying to @richgel999 @BrianOsman
It’s still early but my gut feeling so far is that ASTC is flawed/unbalanced. From experience with BC7, 3+ subsets aren’t necessary, and not all partition patterns are made equal. ASTC throws the kitchen sink at the problem and hopes for the best.
12:43 PM - 23 Oct 2018
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