How to disable grass tool from removing collisions?

When I use the landscape grass tool, it automatically disables the collisions for some reason, so when I want to use the tool to generate trees on my map, you can just simply walk through the trees. Is there a way to keep the tree’s collisions while still using the grass tool?

Actually, I may have to manually insert all the trees since the grass tool isn’t letting me place less than 1 density for the trees per 10 metres squared (I’d prefer 0.5 or something) and it’s too much. :frowning:

Landscape grass does not support collisions. You should probably consider relying on foliage painting tool to place trees.