I'll try explaining again step by step, though I don't have Bryce here and forgot last night. Create the outmost cone. It's Cone 1. Make it positive, duplicate and make the copy smaller and negative. Group together so you get a hollow cone. Duplicate the inner cone, ctrl-x and ctrl-v it, so it's separated from the first group. It's Copy of 2. Make it positive and a little smaller than the hollow in the first cone. Repeat the process from the first group, so you get a second hollow cone. Take the negative from the second group, cut and paste it, make positive and again a little smaller than the hollow of the second cone. Apply separate volumetric materials to each group. I think that the trick with making each group smaller should work. It is possible that you'll lose the textures if you group the groups to position them. So simply ungroup them when you put them in the position you want. HTW

-- erlik