Thanks IPete2 - that's the sort of thing I meant by "indirect laborious approaches" - as a newbie to 3D work I just wanted to make sure that I wasn't missing anything. For example, I nearly missed the "children" switch available with the collision testing stuff. As an even more extreme example, I nearly started creating my own 3D animation routines!
Thanks for taking the time to respond.
Peter
Thanks for taking the time to respond.
Peter