Hi Russell, Morgan, et al, I would like to request whenever anyone makes revisions or improvements to a formula, that a revision number be included in the formula name. Otherwise there may be confusion among the list members as to which version to use in any posted pars. And if I were to replace the original TMan in my formula collection with the version posted this morning, I would no longer be able to zoom into (or pan, etc.) any images made with the original. So may I suggest that we refer to the formulas posted today as version 2 of the formula if this is OK with everyone: TMan2 (XAXIS) { c1=real(pixel),c2=imag(pixel)*(0,1),c3=p1 z1=z2=z3=0: t1=z1*z1+2*z2*z3 t2=z3*z3+2*z1*z2 t3=z2*z2+2*z3*z1 z1=t1+c1,z2=t2+c2,z3=t3+c3 z=(z1^2+z2^2+z3^2)^.5 z < 16 } TJul2 (XAXIS) {;Try z1=-0.75 z1=real(pixel),z2=imag(pixel)*(0,1),z3=p3: t1=z1*z1+2*z2*z3 t2=z3*z3+2*z1*z2 t3=z2*z2+2*z3*z1 z1=t1+p1,z2=t2+p2,z3=t3+p3 z=(z1^2+z2^2+z3^2)^.5 z < 64 } Cheers, Lee