Speaking of blender tutorials, have you seen a good one for creating UV maps? I found one that seemed good but was beyond my level even though all I need to do is map to a hexagon. I may create a swamp tile soon and may as well fix the rest of my tiles if I can work out how to properly align a texture to a mesh.
On another note, integrating the river system with randomly sized lakes is a fair bit more complicated than I first imagined. That and my brain has been work-fatigued lately.
So I have taken to generating an outline of the the general flow of execution using comments before I actually put the bits and pieces together. This is different from my normal approach of creating a function, then the next, etc and then going back and filling in things I missed. I just drop a string of comment boxes in the general order of execution and then I can fill out each box as I get ideas on how they should be implemented. The best part of creating such outlines is I can rearrange the order and put things in the middle before things get all stringed together.