So the art books from from me not being able to find enough SEA fantasy visuals (that I like), so it's an exploration of different possibilities/visuals. Sort of like a mood board for myself. So they are art for the project but not specifically a thing at the moment (might make it a thing in the future). I got DM friends who use the art just to kind of set the tone, help other folks imagine and immerse in this world.
The studies are for a few entries about cool actual objects in SEA, like What do folks use as paper? betel sets, etc.