- dice that land in the Doors and Exits region indicate modifications to the wall (Collapsed, Excavated, Jagged, Fall-off, Ledge, Slanted)
- dice that land in the Features region indicate modifications to the floor or internal room structure (Columns, Depression/Well, Tiers/Terraces, Obstacles, Lump, Slope)
- dice that land in the Objects region (center) indicate modifications to the ceiling (Crossbeams, Dome, Jagged, Open, Vent, Slope)
For dice that land anywhere except in the Doors and Exits region, you can use the letter codes for additional details, in the standard Random Random Table approach. For example, if a roll of D2 shows up as a (Floor) Feature, the dip or depressed area of the floor can be filled with water; L2 might indicate lava instead. An S5 roll in the center (ceiling feature) might indicate that sewage drips/pours from open vents.