Why even both editing in Photoshop or something other than TileM? (suggested workflow)
I personally cannot think very well, when trying to edit something like this:
So what I will do, is export this tileset, and rearrange it in Photoshop, to something that makes way more sense to me:
Then, when I'm done editing in Photoshop, I will take my edited tileset, scramble it back up into the order that TileM needs it. Finally, I will re-import it into TileM:
Despite the extra time it takes to de-scramble and re-scramble tiles to and from the necessary order, I found this workflow to be worthwhile, as I was able to make better creative decisions, much quicker. Furthermore, with this method, sometimes I would edit tiles in the context of a full screen mockup in Photoshop. This is how I did the edits for the bench, considering the changes I was making in the context of a full screen in play.