Pretty pictures FTW!
@
Kergelen, I received your mail and pictures, as well as from the others and I'll adress particular bugs and remarks via PM shortly.
@
epicblunder, a number of
PEG's mmps have this issue. It's not because there's an ID conflict, as is suggested on SimTrop but because the FloraPreferences are still present. However the FloraPreferences is only used for tree controllers, since mmps can be plopped manually everywhere.
As for the firs, the main reason they're relative far apart is the models from Girafe in fact consist of multiple trees, which makes for rather large models. What's more, put them close together and trees start to get in each others way, with overlap and cut-off between models and pretty soon things get a little messy. In addition these were some of the earliest brushes I've made and at the time, I was happy to get it working in the first place.
That said, you're not the first to notice the firs look a bit sparse, especially compared to the decideous trees and I will surely adress it in the future.
As for the meadows, I didn't include many yet because of what
Swordmaster rightfully noticed. As with everything in Simcity, the moisture level is based on the grid. And since there're only small items in a meadow brush the result, when applied thoroughly, is it fills up every single tile, like so;

This of course goes for every other brush as well but usually it's less noticable as the models are bigger. However, depending on the landscape and thus the height and moisture levels, transitions may still appear a little square from time to time, especially at larger zooms.