Hello everybody

(Jonathan) Have you tried the command line option debugflag=322?

I tried including "debugflag=322" in the PAR files. It seems to make no difference to ANY of the tests.

(Jim Muth) If the bug were corrected, many of the older parameter files would not work.

I know just what you mean! It's a real pain in the proverbial! Nevertheless, I'd make the following points: 1. Fractint appears to me to be be a bit of an icon (!) in the fractal generation arena. Its formula parser represents a de-facto standard by which users of different packages (and home-grown engines like mine) can share images. In the home-grown case, I use fractint as a benchmark to test my program (which is how I came to discover the bug) 2. While packages will vary in their approach to interface issues and rendering techniques, it is surely critical that the underlying mathematical "signature" of an image (as encapsulated by the formula + the target window) should be both consistent and accurate. 3. Accidental artifices that produce desirable effects can be retained, where it's deemed desirable and practicable, by having the package support an option to allow the former bug to be activated (as I understand was done with cos/cosxx). 4. Mathematical bugs cut both ways - they might produce interesting images that otherwise would never be found, but they might also conspire to prevent discovery of others! 5. Corrections to parameter files for images based on MandelbrotMix4 would only require window-reflection, a relatively simple task. But what if the reflections we are seeing here are NOT the only symptom of this bug? What if other artificial side-effects are going undetected? This itself is a good argument for fixing the bug, and checking samples of the various formula types. In other words, I hate to be a pain the arse, but I don't see that we have a choice! Cheers Jim White __________________________________________________ It's Samaritans' Week. Help Samaritans help others. Call 08709 000032 to give or donate online now at http://www.samaritans.org/support/donations.shtm