default_desert_sand.png and
default_desert_stone.png made out of desert textures of wz2100
(https://github.com/Warzone2100/warzone2100/blob/master/COPYING)
technic mithril chest, sonic screwdriver and uranium made out of
textures from HavenTP
moreblocks_cactusbrick.png from cisoun I think
For a description of this texture pack, see https://forum.minetest.net/viewtopic.php?f=4&t=4632.