HannesC said in Custom camos don't seem to load:
Just putting it here, it's a good tool.
https://www.itsmods.com/forum/Thread-Release-IWI-DDS-Fast-Converter-V1-40.html
Worked with this!
For anyone wondering in the future, in case you have *.png textures.
Convert the pngs to DDS here: https://online-converting.com/image/convert2dds/ (using A8R8G8B8)
Convert the DDS to IWI with the tool linked above.
Put them into the folder and they work.
Thanks!