Accodring to the DDS documentation, the size of each mipmap level should
be:
max(1, ( (width + 3) / 4 ) ) x max(1, ( (height + 3) / 4 ) ) x 8(DXT1) or 16(DXT2-5)
But in dds loader a slightly different formula was used which
provided different results. Check gh issue #105136 and pull request for details.
85a9c73a84