Hi Chinaski, thanks for the tip, I've spent about 4 hrs building clouds, but so far I can only place particles by using lights and PMatterWaves in Cinema 4D. If you're using C4D, could you give any tips on how you set up the b/w image maps for the PMatterWaves node, so that you get more precise control. I've tried millions of combinations nearly and my brain hurts. Any tips would be great, it's a cool effect. Thanks.