Sorry, crappy WiFi connection made my post appear twice! If an admin or mod could delete my second response post, I'd be grateful! :D
Either way, I already have one map made for Risen3D. However, since I was just learning the port when I made the map, I created a lot of new textures to replace many in the textures folder for Doom2. On top of that, it is an absolutely massive map - it having grown to a colossal 3-something megabytes before I started learning the ins and outs of Risen3D.
I may post it, if enough of a demand arises for it. It is a massive map, but it is absolutely gorgeous. If I do post it,though, it will require renaming your textures folder in Risen3D's directory to something else, then dropping in my textures folder.
Kind of a round about, pain in the backside way of doing things, but it was before I began learning what Risen3D could do.
With the map I am working on now, I have created my own custom textures folder, and am embedding their low-res counterparts in my pwad.
My pwad at any rate, is going to consist of several levels, many of them mirroring what I think the original Doom 2 wad could have been, had John Romero and his clan had more time and a market with better computers to release a game to. I am planning something pretty ostentatious, but fun, well thought out to help showcase Risen3D in the light I think it deserves!
--Have Doom 2, Doom Builder 2, Risen3D, Will Travel. :)