Dear reader Intro It was Jim Muth, who gave me the inspiration to contribute now and then to the list. I transport his pars to a file specially called muth.par . About once a week I render some of them. Often I like the pictures. It is also quite funny to compare his rating with the one I should give. Most o the time they differ considerable. For instance the last one I rendered, the one 31-12-2002 named:"so let it be", I would rate an 8 at least. It reminds me of a (intricate) staircase. And because it's never ending I should have call it "staircase to heaven". Ismand In the documentation (helpfile) of fractint you can find under "formula" that it's possible to use the predefined variable ismand to create formulas with witch you can toggle between mandel and Julia frm's. But how? A few weeks ago I run into the demo from Sylvie Gallet, so know I know. But it might be a good idea to put some information about the use of ismand in the documentation itself. The formula frm:Jh_square {;Jos Hendriks,2002 if (ismand) z = 0 , c = pixel else z = pixel , c = p1 endif : a=real(z),b=imag(z) z=a*a+flip(b*b)+c real(z)<p2 && imag(z)<p2 } This time, again, a simple and at first look nothing promising, formula: f(x,y)=(x^2,y^2)+c. I don't think there exist a ( simple) complex equivalent. The Mandelbrotset is a square (not hard to see) with corners (-2,-2) and (0.25,0.25) (witch is more difficult to see). So that gives really nothing. Nevertheless Juliasets can give nice images (although then nothing of the Juliaset itself is to be seen). Sometimes with fractal features. Below are two pars. I called the pictures: "looking at the block of flats at the opposite of the street and "looking out of the window to the windows at the opposite of the street." They render in seconds, even on a slow machine. frm:Jh_square {;Jos Hendriks,2002 if (ismand) z = 0 , c = pixel else z = pixel , c = p1 endif : a=real(z),b=imag(z) z=a*a+flip(b*b)+c real(z)<p2 && imag(z)<p2 } block_of_flats { ; Jos Hendriks ,2002 reset=2000 type=formula formulafile=fractint.frm formulaname=jh_square ismand=n passes=1 center-mag=-0.77118865717993890/+0.78113466887094510/227799/0.6848 params=-2.522474238758866/-2.5106260160601/4/0 float=y colors=00000e0e00eee00e0eeL0eeeLLLLLzLzLLzzzLLzLzzzLzzz000555<3>HHHKKKOO\ O<3>ccchhhmmmssszzz00z<3>z0z<3>z00<3>zz0<3>0z0<3>0zz<2>0GzVVz<3>zVz<3>zV\ V<3>zzV<3>VzV<3>Vzz<2>Vbzhhz<3>zhz<3>zhh<3>zzh<3>hzh<3>hzz<2>hlz00S<3>S0\ S<3>S00<3>SS0<3>0S0<3>0SS<2>07SEES<3>SES<3>SEE<3>SSE<3>ESE<3>ESS<2>EHSKK\ S<2>QKSSKSSKQSKOSKMSKK<2>SQKSSKQSKOSKMSKKSK<2>KSQKSSKQSKOSKMS00G<3>G0G<3\
G00<3>GG0<3>0G0<3>0GG<2>04G88G<2>E8GG8GG8EG8CG8AG88<2>GE8GG8EG8CG8AG88G\ 8<2>8GE8GG8EG8CG8AGBBG<2>FBGGBGGBFGBDGBCGBB<2>GFBGGBFGBDGBCGBBGB<2>BGFBG\ GBFGBDGBCG000<6>000 } windows { ; Jos Hendriks ,2002 reset=2000 type=formula formulafile=fractint.frm formulaname=jh_square ismand=n passes=1 center-mag=-1.64e-006/2.205e-006/0.5706675 params=-2.016863584518433/0.3288808465003967/3/0 float=y colors=000z0zc0cz00c00zz0cc00z00c000z00c0zz0cc000000zzzccc<238>ccc }