I'm posting Toxic Caverns map pack! I hope it's not too confusing, but I left magma labels on toxic acid hexes, because I would like those hexes to act just like magma in terms of rules! But as for visuals and fluff around it, I want it to be pits full of corrosive acid!
In most cases you can move around those, but because of how narrow tunnels are, there are also some flooded sectors where you will need to force your way through the acid or avoid it. There are also a lot of spots where you are in a vulnerable, where the enemy can push you into the acid if you are not careful!
There are some mineral/metallic formations sticking out of walls serving just like forests and providing you with cover. But I've also placed some plantlife on some hexes - there probably shouldn't be any in enviroment like that, but I wanted to give the place those underground toxic jungle vibes.
I hope this pack will be fun to play! I do not do underground maps that often, but I think limiting movement to tunnels and caves is a nice break from regular open terrain every now and then!