Reproducing DD3 maps in GIMP or Photoshop

[Barlie]

Below I've attached 3 simple battlemaps I made using DD3, 2 of my own design, the third from following the joesweeney88's youtube tutorial on dungeon mapping. I used artwork from the CSUAC and MapTools artwork repository in addition to what came with DD3. I no longer wish to use DD3 due to it's instability, but I want to be able to reproduce those maps in either GIMP or Photoshop CS5, right down to the tiling, beveled walls, and wall shadows. How labor intensive would making those maps be in either GIMP or Photoshop CS5 as compared to DD3 assuming I was equally proficient in all 3 programs? Are there any add-ons I'd need to do this? Any and all help would be greatly appreciated.

Example Map 1 .jpg Example Map 2 .jpg Example Map 3 (JoeSweeney88).JPG