Rich, Part of the problem is the difference between the formula parsers. The Xfractint code is using the C parser and Fractint uses the assembly parser. There is something else going on, also, because the image generated using Fractint with debug=90 (to force the use of the C code) doesn't match what we are seeing. I'll have to look into it. Jonathan
Here's another one that doesn't render right on xfractint.
Compare to <http://www.nahee.com/FOTD/FotD_97-04-17.html>
; START PARAMETER FILE================================================
fracfern { reset=1950 type=formula formulafile=fracfern.frm formulaname=fracfern passes=1 center-mag=0.636995/8.88178e-015/0.07861635 float=y maxiter=10000 bailout=100 inside=bof60 logmap=yes symmetry=xaxis periodicity=10 colors=0007A86A85B84C73C7<37>_K__K_ZJZ<32>B7LHCLCHKCKKNNKSNK<13>XQGXQGWR\ F<39>t6lu5mw3m<21>USn<63>w7Lw7Lx5M<19>eTDCHA<4>8F9 }
frm:fracfern {; Jim Muth z=c=pixel: z=z^1000*(c^(-1002))+c, |z| <= 10000 }
; END PARAMETER FILE==================================================