Another topic on the same request, well in case the other topic is not noticed after it falls off the front page I would also like to add to this one :
Intel Texture Works is the most recent advancement to the various DDS formats, now supporting DX11+, and has a few new texture formats which are now being used by games. The most desirable being BC7 Linear Fine with MipMap generation.
We can now have normal (bump) maps where the detail counts (without artifacting) and have them compressed.
It would be very nice if Affinity Photo could support the plugin (its an .8BI plugin and a cubemap script), currently only Adobe Photoshop can use the plugin, so anyone wishing to seriously take part in developing textures for games like Skyrim Special Edition or Fallout 4 need Adobe Photoshop .. Otherwise they cannot produce the correct texture formats for overall optimised performance without losing a lot of detail after compression.
No doubt the next generation of games will also be utilizing those newer formats listed on the Intel Texture Works page.
The NVidia plugin does not support the newer formats, and the GIMP DDS and Normal plugins I believe are no longer being developed, Intel Texture Works plugin is the way forward which supports all of the older formats aswell.