Another thing that needs attention is fire. Classed in the explosives section, it can pass through the solid permeable wall and the gas permeable wall.

Is this deliberate, or a mistake that has not been noticed/fixed?


edit-
Liquids appear to get stuck in the gas permeable wall, if water is placed in a gp bowel, and steam is spawned under it, the cool water that cannot permeate the wall cools the steam while it is still in the wall , because non-gasses cannot go through the wall, the water remains stuck in it.

I hope it is a mistake, because this Gas wall is exactly what I wanted. But also, give Simon time. He's done a lot, so he'll fix it soon.