I can say that PS:CS tiffs are definately backwards compatable as per my experiments resulting in a tif2pgm converter(see bryce forum for details) which uses 16 bit tiffs generated in PS:CS to create 16 bit height maps for Bryce. other than that I don't know as I don't have PS:CS, but my previous internet searces in this regard seemed to point to an increasingly negative attitude towards their customers and for that matter plugin developers on the part of Adobe. I hope this apparent trend does not continue. I think the customer base of Poser 5 revolted at the thought of activation codes and other such issues - in general they are a bad idea as: "I think without customers we ain't got no wallmart" to quote a commercial for said store. I was gonna try to save up and get cs for it's 16 bit capabilities and LOL so I could use the 16 bit part of my own utility, but perhaps I'll wait a while to get CS - see how it goes. - TJ