>>341470871
>>341473758
It tells you what compression is used below the texture.
DXT5/BC7 (with alpha channel) => 1 byte per pixel
DXT1 (w/o) => 0.5 bytes per pixel
RGBA => 4, RGB => 3 bytes (no compression)
Meaning an 8k texture will at least be 32MiB in VRAM, 64MiB with transparency.
Crunch compression is only for file size.