BC7 has a weakness: There’s only a single alpha mode that supports 2 subsets (mode 7). And it assumes alpha is correlated with RGB. The other alpha modes are only 1 subset modes, so they can’t handle complex RGB blocks well.
-
Show this thread
-
So if the block has uncorrelated alpha and is complex enough in RGB, there’s not a lot you can do. Either RGB suffers or alpha suffers.
2 replies 1 retweet 1 likeShow this thread -
Replying to @richgel999
Does ASTC’s colour channel combination system fare better here?
2 replies 0 retweets 0 likes
Replying to @Zellski
I’ll look (I don’t have ASTC burned into my brain like BC7 is).
9:05 AM - 3 Nov 2018
0 replies
0 retweets
0 likes
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.