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.

Easiest is to just install patch 3. Unless I remember incorrectly, Patch 3 doesn't require the CD, and should be the only one you need (see my previous answer above)

Finally had the time to start on my own map. It will be a simple level for the mega-dungeon.

The map is divided into two halves by a chasm, with a fire giant being trapped on one side and a frost giant on the other side (maybe they will morph into wizards or elements or something later, let's see as the map progress).

So far, I've only just started on the chasm dividing the map in two.