How stable is your friend's internet connection? Does he play on Wi-Fi or Ethernet? If he plays on Wi-Fi is he far from the router? (Like behind walls or something)
See if you can compress the pngs a bit
Best thing would be to put them in existing categories so it's easy for people to find them. I believe it's defined in the terrain xml file.
That would be nice. Also if someone could tell me if my eyecandy mod textures are worth putting in the game I've never been able to judge :/ https://github.com/0ADMods/eyecandy/tree/master/art/textures/terrain/types/new
Try to build with
./update-workspaces.sh -j3
instead of
./update-workspaces.sh --with-system-nvtt -j3
We recently updated NVTT, and it might not be compatible with whatever is in your distro's repository