Large block size ASTC has been misunderstood

Most game developers misunderstand ASTC: the largest block sizes were intended for the largest resolution content (4k) . GPU shader deblocking is easy: at the largest block sizes it's essentially free (because the bottleneck is typically memory bandwidth on mobile/tablets, not some ALU or cached tfetches). The largest block sizes collapse memory consumption/bandwidth enormously (0.89-1.28 bpp for…