First map, noob question

Boldloop

L1: Registered
Apr 9, 2016
3
0
Currently, the ground of my map is just a flat brush. How can I make it bumpy so that it looks more natural?

PS: I tried looking it up but I was quite uncertain about the search terms.
 

Joshenkstone

L5: Dapper Member
Oct 24, 2015
208
184
No problem I had to be told about displacements while streaming that's a lot more awkward I guess.
 

Boldloop

L1: Registered
Apr 9, 2016
3
0
Thanks so much. I recognize freyja's name from suijin (also my fave map). Checked out all of the sources