Disclaimer: Ive got my two-year-old and four-year-old today so Ive got to try to be brief or itll look like a twister hit in here!!! More complete disclosures if I survive the day. 8P I was around for a couple of tornadoes during the period when I was living in Birmingham, Alabama. I was really amazed by the phenomena; how quickly the world went from day to virtual night; how eerily alien the light was, how localized the damage from the twister itself could be while the associated winds could be much less discriminating. Had a few up here in Connecticut too but the hills change the way they act The sky end up being Roobol-ized with 2D tornado planes in two separate locations over the Bryce sky - atmospheric lighting and sun on. I was working with multi-replicates of angled cylinders matted with smoke stack but when youve got four renders of Meskis barn going concurrently and you try a big multi-replicate, or even a test render of a big hunk of volume texture, things start to fall apart so I ended up cannibalizing my inspiration pic instead. (That didnt mean it was a piece of cake though.) This actually ended up being pretty involved. Ill break it all down later if anybodys really interested. One things for sure I wouldnt have been able to pull it off if I wasnt hanging out here snapping up every piece of information in the forums, from the posts, in e-discussions, and from everybodys home sites too (even the links) - I think thats the way the community is supposed to work. Thanks!