Im not sure if I done it correctly.
I am modeling a Cul-de-sac terrain and I thought I can use “boolean” to cull out where driveways are.
However, boolean gives me really bad meshes and I have hard time to display/render them properly.
Wondering if you could help me and take a look, I have my .hip file attached.
Also I included a .gif to show you the dirty meshes I produced

thank you very much