Thanks Danamo, Lordstormdragon. I was hoping it would be helpful to someone and I must admit to a certain self interest that the more people who use this stuff the more the knowledge base of what can be done will grow and it will mean more trees and more variety to trees :) I've only learned Bryce by being able to ask questions and get help and whenever I try and learn a program where not many people use it I get stumped and can't move on. The author of Arboro did thankfully reply to my question to him after a day or two so I could move on with that after I'd hit a serious hitch. My biggest problem with Arboro so far is that sometimes after whirring for half an hour or an hour I'll still end up with an .obj file that is 0Kb. Now I will go back and see if .inc is any better knowing I can convert. Very useful tip Lordstormdragon! I've used tree lab foliage once before on a mesh trunk and you're right, placing them was a nightmare. The worse nightmare was that having turned the trunks transparent then used a volumetric fog cube to enclose the whole scene I got a whole mess of artefacts. But, it was a start and tree lab foliage IS very nice, just the trunks that suck.