Yeah, I can see it could be a problem. Because I'm a 'physical' sculptor it hardly ever occurs to me that the inside of an object exists in any useful way. I guess if I was still working with metal (I worked for five years as a silversmith after I left college) I'd view the outside more as a 'skin' without thickness, and the inside space as something that could be exploited. Lately I hafta admit I've been looking at the reflective properties of Bryce, and thinking that a lot of interesting things could be done with polished stainless steel. But it's so high-tech and expensive (you have to hand over the manufacture of the finished work to 'the experts') that I've been reluctant to go that route. The way I work at the moment I can make my moulds and do my casting myself, which means I can work on a very large scale. Once you start working in metal of any kind the cost leap from 4000 or 5000 to 50,000 and on upwards towards the sky. So the foundry and finishers make all the profit, you just get the kudos, and you can't eat kudos :^( @ pumeco - as I mentioned above, you can place Hole material on any area you don't want to appear in the render. Not the same thing, but the beauty of Wings is its ease of use. Quite a lot of Maya and Lightwave people do their modelling in Wings, then move the model into the other apps at the finish.