Thanks for the excellent feedback guys. These are some truly insightful suggestions - and the way the dog renders, should keep me busy until they release the P5 chip! A couple specific questions - First kind of @ Blog - I'm sitting on PSP8.1 here, which filter did you have in mind? I've also got (but never use) PS Elements if there are any alternatives in there. Second - clicking infinite on the spot throws it forever - is there any way to get a better gradient on the falloff on the side of the light cone or is that handled in post? Incidentally I'm gelling those with one of my 'brooding cloud' photos which is also up on a 2d plane behind the sub with only about 40% diffuse to show the density difference and current upsweep for the thermo cline. (Any divers here?) Third - is the terrain itself getting in the way? Does it need something less convincing and more fish tanky? Hell, Im just about starting over from scratch here anyway Fourth and finally for now got any specific mat suggestions for the sub cockpit dome? They are going to run dark or red in there to preserve their low-light vision so there wont be a lot coming out, but how do you think the light hitting it from the outside should interact with it? Well no, not finally, this is finally Thank you all for your patient attention and helpful feedback.