Two par files today illustrating a pecularity of the Zf_Ang formula, one of Paul Carlson's orbit trap formulas. With a postive "number of iterations to skip" value (imag p2) there is blank space and truncated stalks (which give some of the orbit trap formulas their name). With a negative imag p2 value the blank space is filled in. However I have gotten this techique to work only with this one formula. Another quirk of these formulas is the requirement of using outside=summ to generate high banding count images. Bypass the calculation process and go to http://maxitersfractalfollies.blogspot.com for immediate viewing and put the serve back in web server. fract263.gif { ; Carlson stalks positive skipped iterations value ; blank ; calctime 0:03:50.63 ; created Jun 19, 2010 ; Fractint Version 2004 Patchlevel 9 reset=2004 type=formula formulafile=frac_ml.frm formulaname=Zf_Ang function=sqr center-mag=0/0/0.6666667 params=-0.2551805169835505/1.054979094821009/3/1/2/128 float=y maxiter=1500 inside=0 outside=summ invert=0.5/0/0 cyclerange=0/255 colors=zffzffzeezddzccyccybbyaay``x``x__xZZxYYwYYwXXwWWwVVwUUvUUvTTvSSvR\ RuRRuQQuPPuOOtOOtNNtMMtLLtKKsKKsJJsIIsHHrHHrGGrFFrEEqEEqDDqCCqBBqAApAAp9\ 9p88p77o77o66o55o44n44n33n22n11m00m00l00l00k00j00j00i00h00h00g00g00f00e0\ 0e00d00c00c00b00a00a00`00`00_00Z00Z00Y00X00X00W00V00V00U00U00T00S00S00R0\ 0Q00Q00P00P00O00N00N00M00L00L00K00J00J00I00I00H00G00G00F00E00E00D00C00C0\ 0B00B00A00900900800700700600500ffzffzeezddzcczcczbbzaaz``y``y__yZZyYYyYY\ yXXyWWxVVxUUxUUxTTxSSxRRxRRwQQwPPwOOwOOwNNwMMwLLvKKvKKvJJvIIvHHvHHvGGuFF\ uEEuEEuDDuCCuBBuAAtAAt99t88t77t77t66t55s44s44s33s22s11s00r00r00q00p00p00\ o00n00n00m00l00l00k00j00j00i00h00h00g00f00f00e00d00d00c00b00b00a00`00`00\ _00Z00Z00Y00X00X00W00V00U00U00T00S00S00R00Q00Q00P00O00O00N00M00M00L00K00\ K00J00I00I00H00G00G00F00E00E00D00C00C00B00A00A009008007 } fract264.gif { ; Carlson stalks with negative skipped iterations value ; blank ; calctime 0:05:06.60 ; created Jun 19, 2010 ; Fractint Version 2004 Patchlevel 9 reset=2004 type=formula formulafile=frac_ml.frm formulaname=Zf_Ang function=sqr center-mag=0/0/0.6666667 params=-0.2551805169835505/1.054979094821009/3/-1/2/128 float=y maxiter=1500 inside=0 outside=summ invert=0.5/0/0 cyclerange=0/255 colors=zffzffzeezddzccyccybbyaay``x``x__xZZxYYwYYwXXwWWwVVwUUvUUvTTvSSvR\ RuRRuQQuPPuOOtOOtNNtMMtLLtKKsKKsJJsIIsHHrHHrGGrFFrEEqEEqDDqCCqBBqAApAAp9\ 9p88p77o77o66o55o44n44n33n22n11m00m00l00l00k00j00j00i00h00h00g00g00f00e0\ 0e00d00c00c00b00a00a00`00`00_00Z00Z00Y00X00X00W00V00V00U00U00T00S00S00R0\ 0Q00Q00P00P00O00N00N00M00L00L00K00J00J00I00I00H00G00G00F00E00E00D00C00C0\ 0B00B00A00900900800700700600500ffzffzeezddzcczcczbbzaaz``y``y__yZZyYYyYY\ yXXyWWxVVxUUxUUxTTxSSxRRxRRwQQwPPwOOwOOwNNwMMwLLvKKvKKvJJvIIvHHvHHvGGuFF\ uEEuEEuDDuCCuBBuAAtAAt99t88t77t77t66t55s44s44s33s22s11s00r00r00q00p00p00\ o00n00n00m00l00l00k00j00j00i00h00h00g00f00f00e00d00d00c00b00b00a00`00`00\ _00Z00Z00Y00X00X00W00V00U00U00T00S00S00R00Q00Q00P00O00O00N00M00M00L00K00\ K00J00I00I00H00G00G00F00E00E00D00C00C00B00A00A009008007 } frm:Zf_Ang {; Copyright (c) Paul W. Carlson, 1998 ; p1 = Julia set coordinates ; real(p2) = controls size of the elements ; imag(p2) = number of iterations to skip ; real(p3) = number of color ranges ; imag(p3) = number of colors in a range ; z = k = iter = range_num = bailout = 0 w = pixel c = p1 prev_modw2 = 1.0e20 size = real(p2) skip_iters = imag(p2) num_ranges = real(p3) colors_in_range = imag(p3) factor = (colors_in_range - 1) / size : w = c * (w - 1 / w) a = 2 * atan(imag(w) / real(w)) a = a * a + c a = fn1(1 - a) / a ; dist = abs(|w| - |a|) IF (dist < size) bailout = 1 IF (iter > skip_iters) k = 1 ENDIF z = (factor * dist + range_num * colors_in_range + 1) * k ENDIF range_num = range_num + 1 IF (range_num == num_ranges) range_num = 0 ENDIF iter = iter + 1 z = z - iter bailout == 0 && |w| < 1.0e20 ; } Roger Alexander _________________________________________________________________ Turn down-time into play-time with Messenger games http://go.microsoft.com/?linkid=9734385