I have been experimenting with seasonal changes for grass. Two aspects specifically :
* color gradually changes from light green (spring) to a dark green (summer) and finally to brown (fall). This is more artistic than realistic but i think it looks nice in a game like daggerfall.
* grass size changes a bit to smooth transitions to and from winter. Height is highest on summer and decrease simmetrically towards winter on both spring and fall.
Would you be interested in something like this? Optimally trees should have a similar behaviour with growing/falling leaves etc. but i think even grass alone has a considerable effect on the general mood.
Before releasing the update with seasonal changes, i wanted to rework some plants graphics, also using free licensed art which i adapted to unity terrain and wind system. This is how it looks so far