racofer: https://www.youtube.com/watch?v=RNRV1aCbwzw Aard also no longer interacts with the grass.
hyakki: Yeah I noticed this too, hope they fix it!!, to be fair in version 4.03 - 4.04+ I also had no grass collision either, it seems to have been broken for awhile.
I think it has to do with Global Illumination or Real time shadows or something. Newer games doesn't have interactive leaves and grass because of it.
We're sacrificing so much just for "realistic lighting"