Hi Jim,
So far, so good, but I wonder how much of the original Fractint code now resides in slightly modified form in the other program, which is being sold for profit. Something not quite ethical appears to have happened somewhere along the line, but neither I nor apparently anyone else can pin it down.
It's an intersting question but my answer is "probably none." Ultra Fractal is written in Delphi and Fractint in C. The Fractint compatibility formulae are written in Ultra-Fractal's formula language. The source of these is available and IMHO it is indiscernable from the fractint code. Plenty of other programs implement the same forumlae as fractint and many of these are hard-coded in C - I think these are more questionable. btw: can someone give me a link to the old fractint archives from the majordomo days? From, Rupert _________________________________________________________________ Join the worlds largest e-mail service with MSN Hotmail. http://www.hotmail.com