Here's another side content addition coming in the next update to Shattered Pixel Dungeon, a few new terrain objects! Each region is getting something new for a little more visual variety: barrels in the sewers, cages in the prison, metal scaffolding in the caves, flaming pedestals in the city, and chunks of rubble in the demon halls.
These new terrain types will show up in some new standard rooms, and a few of the existing rooms already in the dungeon. Here's an image showing one example, with some very much unfinished barrel visuals.
(Image Description: screenshot showing the sewer region. In the top-right of the room there is a row of storage barrels. The barrels are using placeholder visuals, they are notably lower detail than the other dungeon elements.)
only visual?
Yeah, these levelgen additions are more about variety and flavor than new gameplay interactions.
Does that mean the barrels won't be flammable?
Currently they are not going to be flammable no. It's possible that this could be changed in the future but a solid wooden, treated barrel is going to be much less flammable than something like a door or grass.