A Concept for Soul Harvest that didnt make it into the actual game..
the initial idea was to get an interesting vertical color pattern by playing around with the idea of a decreasing temperature (from up - closer to the source - to down) leading to different sorts of bacteries/algae thriving in the seperate levels of the ponds, hence ending up with different color schemes in each micro-biome.
Check out Spellforce 3: Soul Harvest on steam:
https://store.steampowered.com/app/817540/SpellForce_3_Soul_Harvest/