Francesco Legrenzi has a great tutorial on his site on how to create 3d clouds using V-Ray. Click here to go to his site and view the tutorial (He's the Italian dude who wrote the excellent book called: "VRay - THE COMPLETE GUIDE". ) VRayEnvironmentFog - Test 01 from Francesco Legrenzi on Vimeo .
3D and V-Ray tutorials, news, experiments. And some Swift too.