I think the first step will be to create various walls so that the current 2D maps can be replaced with 3D maps.
Creating the actual model above was relatively easy, the textures on the other had seam to be a little more of a challenge.
Next goal is to create a simple wall and incorporate that into frost and flame, one that has been achieved, then more complex and visually appealing models can be created.
1. Simple "block" walls, brick texture probably, 2 piece, wall and corner, various textures can be applied.
2. Cave walls.
3. Castle walls.
4. Various dungeon walls.
5. More, variety!
At this point I think it best I rewrite the model OBJ loader and get some models in game, work on texturing the models and some lighting etc...