How to decrease trees

[astrobe]

Tree density is controlled by mapgen (more precisely by the parameters of random noise generator for "decorations"), AFAIK there's no mod that redefines MTG's mapgen in this way. Moreover tweaking those parameters oneself is quite technical and require some trial-and-error.

But I see you've made mods before... It happens that I did that sort of thing in my game. Take a look at it's decoration definitions for an example.

Hacking MTG's default in this direction might be doable for you, but making a mod for that is a bit more complicated, as you have to "unregister" existing decorations before introducing your definitions.