Aha, thanks Torstan for helping a brother out. As you may remember I am red/green colorblind, which manifests itself often a a confusion between green and brown, which is exactly what happened this time. If I chose my colors by creating them, I don't make mistakes, but if I take an existing pattern and use it, I often confuse the two colors. So I thought the map was in brown/tan and instead it was brown and tan with a bunch of green. I asked for my wife's help and she pointed out where my colors were bad.

I have to say that I don't see the inside-out issue. It's too far along to fix now, so I'll leave it as is, but it's easy enough to change for future dungeons. There is some assembly required for the walls.

To answer your question Torstan, the methodology used for the floor tiles is simple. I have a grid with strong lines. I turn it on, then "fill" the spaces in between. There is just enough dark brown stroke on the tile layer to add the required grout.

Here is the map with the green removed and some additional bits added.

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