It's just occurred to me that instead of iterating a certain number of times, it ought instead to be possible to iterate for a certain period of time. The granularity needn't be particularly fine - increments of ten seconds, perhaps? - so that checking how much time has elapsed wouldn't be much of a processing drain. I don't know Windows internals at all, but on UNIX-based systems such as Linux I do know that it could be implemented quite simply and with very little processor overhead. In this way those of us who need more iterations than the current maximum permits could have them - I could just say "calculate for 240 minutes", or whatever, and come back in four hours or so to a very high quality image. If it is added, it ought to be as an alternative to the current mechanism, because otherwise it would be hard to do benchmark tests such as the ones we already have. What do people think? Kay ___________________________________________________________ What kind of emailer are you? Find out today - get a free analysis of your email personality. Take the quiz at the Yahoo! Mail Championship. http://uk.rd.yahoo.com/evt=44106/*http://mail.yahoo.net/uk =====================================================The Chaoscope mailing-list Archives : //www.freelists.org/archives/chaoscope Admin contact : chaoscope@xxxxxxxxxxxxxx Web site : http://www.chaoscope.org =====================================================