About the "GIMP-exclusive" info stored in some DDS compression formats
For some reasons anything above DXT5 cause the thumbnail, and some programs to read the dds as having a hue overlay,
nm=inverted with red AlExp=normal color but with what sees like too high brightness YCoCg= blue hue YCoCg scaled= green hue
Edit: This is GIMP 2.10.18 on Win10 x64 The procedure to recreate the issue are as follow:
- open a png (an image of the sub in this case)
- extract as dds
- In the options, choose anything below DXT5 (be it Alexp, YCoCg/scaled etc)
- Check generate Mipmap
- In advanced tab, check "perceptual error metric"
- Choose any filter (used Kaiser in this case I believe, but this doesn't seem to affect the result much)
- Warp mode set as Mirror
- Apply gamma correction and Use sRGB colorspace
updated to GIMP 2.10.22 and the issue still persist.
Edited by Uganda Knuckle