Biomes: Soil structure

[LadyGoo]

Some soil types are easier to dig up, some are harder. Some are great for building on, some are very nice for tunnelling (like London).
It is not something super-relevant or must have, but could give some use for the biomes and geology.

Biomes could affect:
-building time;
-materials cost;
-exp cost for the quality upgrade of wells;
-land levelling, ploughing and etc. energy and time.

[viznew]

i think more unique biomes sounds fun, honestly thay mostly blend together for me (till i go to pave)

the easy biomes whould prob have more people createing more of a designated war zone type of thing (in my mind)

[jorb]

Don't hate it, but that would imply preserving the terrain down to the soil tile, which is at least a bit of work, and I'm not sure the benefit really makes that much of a difference in the end.