Landscape Grass Type

When i put density lower than 1 it doesn’t change anything and my forest ends up being way to dense and I don’t know how to fix that

I’m pretty sure the grass type is just for grass. You’ll need a procedural foliage volume for the trees:

Yeah i can make it that way but I want it painted only on the certain material inside the landscape and for that I have no clue how really since I use the slope to blend rock/grass material

Still possible, take a look at this page, search for ‘only spawn’: