Can i make an invisible terrain layer?

Is there a way to make a layer in a landscape layer blend invisible to make is seem there is no terrain there?

My question is, why would you want to do this? Are you trying to create a hidden area?

If you talk about having a «hole» inside the landscape, here what you need!

Cheers!

No. I’m making a cave level and it’s almost entirely terrain. I brought terrain up for walls and painted it how I want it and the spots I don’t want I painted with a black layer but it doesn’t look right against the pitch black. And I’d like to also make an invisible barrier using terrain around the cliffs. I know I could use blocking volumes to do that but to block it off exactly how I’d like it would require ALOT of blocking volumes. Figured I could just make an invisible wall with terrain if possible and have more control over the shape of my barrier