Nice to see your result there Bob. I don't think I will ever not model in Cinema, but I do sort of like that stacked nodes approach, and it's great for making tutorials where you can just keep stepping back right to the start.
Talking of which, a Houdini question if I may ? Looking at that node list there, what would happen if you went back to one of the first nodes now, and changed something ? Would that change propagate all the way up the list, or would it do what 3DSMax's stack would, and warn you that you will break later stages by doing this ? Just trying to find out how truly parametric it is !
CBR