Can I Use Terrain tool on an Imported Mesh

As the title says. I want to use the tree and foliage tools on an imported mesh. I cannot convert my mesh to a terrain object because Unity will add smoothing. I am using a hard edge, low poly style in my terrain.

After hours of research, I think I might be out of luck here. Am I limited to placing trees/foliage by hand?

 

Hi! Terrain Tools = no ... but you can do this with Polybrush Keep in mind the tool is still in "Beta", we're working forward on it, but it's very useful already! Here are some links:

http://www.procore3d.com/polybrush/

http://procore3d.com/asteroid-world-tutorial

 

Interesting tool. Will this remain free? And no support for 2018+?

Thank you for the suggestion. Guess I am out of luck for now.