Rich,
This par has periodicity=0, so the next statements don't matter. Periodicity uses the value of z to determine when to bailout. The Mystic2 formula uses LastSqr for determining when to bailout, which in this instance is g.x^2 + g.y^2. Therefore, periodicity would calculate bailout based on the wrong variable.
Interesting. So why does it render correctly on the DOS parser?
Because periodicity is not being used, there is no effect due to this "error" in the design of the formula.
There *is* a problem with the Xfractint formula parser. Try setting inside=zmag with this par. I get a segmentation fault.
What does the DOS version do? Something correct, or just something not crashy?
Something correct. For inside pixels I get an iteration count of 90 in the DOS version, which is what is expected with maxiter set to 90. This can be seen on the <TAB> screen. With Xfractint I get an iteration count of 2 for the same inside pixels. Jonathan