ToME WikiMany dungeon features remain from ToME. Not all, however.
Wall Types
Boiling vat (#, looks like and replaces magma wall) is something you find in places like Troughs. It emits infrared radiation, thus making the squares immediately next to it lighted for players and monsters who can see in the infrared. You really don't want to tunnel through this. If the game even allows such a thing (it might make sense with a distance "spell" and against monsters), the resulting stain on the floor is hot and corrosive (plasma + acid), as is the immediate wave that results.
Floor Types
Stable wormhole is ToME's void jumpgate by another name.
Force field is ToME's rune of protection by another name.
Mech waste is dark in color and acidic. It is seen in many places in Snowglade, as the mechs don't care about the organic environment and the planet will soon be eaten by a black hole anyway. I think mech waste can maybe displace ash.
Timestone is a floor material (violet for game purposes) found in the esty. It is mostly solid, but somewhat unstable. It randomly glows with light maybe about half the time and is the principal source of light and heat in the Wedge. You can rest on timestone, but you will probably regret it when you stop resting and notice the hp loss.
Unstable timestone (dark blue?) is found where esty Lanes cross. It may randomly do nasty stuff to everyone near it, which means neighboring squares or standing on it. This includes shard explosions, teleportations, teleportations with wormhole (void jumpgate) creation and/or crushing, summoning monsters, and time effects. On the other hand, unstable timestone can be digged to create a shaft into somewhere else. It is harder than normal granite.
Time water (violet ~) is water that is laced with time and very harmful to step into. A misstep will cause random elemental damage, which will be fire, cold, or time itself.