Like this then:

Something like this?

I think this is close to the final appearance for this map. Maybe some tweaks, but other than that, the map is done.

Image below shows map with a grid.

I am using a wall mask which is just the background multipolied with the floor to hide the grid and effects outside the walls. I am also using the color key effect both to break open the central room, as well as hiding the grid over the canyon.

This is intentionally a small place, but for a bigger map, pretend those are 10 foot squares instead of 5.

Great. Thanks for the submission.

Obviously lots to do with this one yet, but I've now added a broken room across the chasm, and some hot and cold rooms on either side. I am using the color key effect to let the chasm break the hexagonal room. Floor colors in the two rooms are provided by a simple RGB Matrix effect, just increasing the amount of blue and red respectively. Might not be the final fill, but I needed a placeholder to guide me.