Hi everyone, I know that this has been discussed on the bb before now, but 20 pages of google search in, I have still come up with zip. I want to vary b-factors smoothly from either point or a plane. This is for pretty-picture purposes. I can then colour molecule by b-factor and get nice, pretty effects. Thank you in advance for your assistance, David -- ============================ David C. Briggs PhD Father & Crystallographer http://personalpages.manchester.ac.uk/staff/David.C.Briggs/ < BROKEN! AIM ID: dbassophile ============================