How Does One Make Natural Looking Environments?

[Pizzachino5768]

With my current mapmaking knowledge (which is not much mind you) I have no idea how to get a bumpy and uneven ground. Anyone mind helping me out here?

 

[ics]

That is called displacements. Some guides https://www.youtube.com/results?search_query=tf2+displaceent

 

[RodionJenga]

Just don't do carve

Also if you want non-video guides try Freyja's Guide or the VDC