I have no problem with opening a file in R15. It looks good even if it does not solve my problem. At first I did not want to use Hazy, but your Hazy looks really good. In my case, perhaps enough for me to know why it formed the visible intersections between the volumes. It's only due to a high setting values PyroCluster-Volume Tracer> World Step Size? If it was my case, then it would be sufficient to set the right balance respectively would help value of about 2-3, and that would also solve my other problem that I still did not write. When doing animation cloud flickering occurs. But the fact remains that increases rendering time (which is already well known) and the appearance of the cloud is not the way it would like to have. I put a larger screen. Once again: I'm sorry for my English. I'm helping a bit with a translator. Thank you M.