Foliage has a Shadow noise/grain - How to fix it?

Well, I commented on their video asking for a solution LOL aahahha.

Besides that, I rendered my scene in 4 hours with MRQ and it look soo nice! Just having a little problems with some foliage shadows bumping from nothing in the begining, but I am pretty happy. (HD Version)

Now in realtime it is just impossible because of this current problem in the foliage shadows.