This fractal mixes two copies of z * z * cos(z) * sin(z) at slightly different locations. The area around the fractal has lots of short arms interconnecting the features. If you zoom in more on the main feature on the right it looks like a castle with six towers. The zoomed in images need arbitrary precision math but the first image works fine with double precison. Here is a link to an image: http://dl.dropboxusercontent.com/u/33642054/image/pr_3cossin-3cossin_BC_1200... A deep zoom into the feature on the left using arbitrary precision math and a different color palette: http://dl.dropboxusercontent.com/u/33642054/image/pr_3cossin-3cossin_CD_640_... A zoom into the castle feature on the right using arbitrary precision math and a different color palette: http://dl.dropboxusercontent.com/u/33642054/image/pr_3cossin-3cossin_DD_640_... The FractInt compatible PAR file for the first image is: Shortarm_Castle { ; Exported from Fracton. reset=2004 type=formula formulafile=fracton.frm formulaname=F_20160221_1004 passes=1 float=y center-mag=-0.6417820664871355/0/9172173044.248877\ /1/0/0 params=1/1/0/0/-1/0/1/0/0/0 maxiter=2000 inside=0 periodicity=6 colors=vQ1h_FViSIsdGnREiDCe0Ec8GaGI_OKYW000MWcOUkQ\ SrTUrWWrZYra_rdargcridrjYokSlkMjlGglAej9Zh8Sf8Ld7E\ c77_A8WD8SG9PJ9RELSAXT5hU1tha9VaLIaX8GHEURBNLIuBGn\ CEgDD`EBUF9NG7ct8S_I53G86EA9CCBAEEGkOCWKSk8NcAIWCD\ OE80P84N87L8AJ8DHhWEaTFWQFQOFKLGEIGdNYOJPaz3NbAPVV\ KRRGNNCJJ1CO5EKLcNJ`MHYLGVKESJCPIBMH9JGqtjknfeib_d\ ZV_VPVRJQNDLJ5_n6Wh6Tb7QX7MR8JL1Cr3Dj4Eb6FV7GNxfdm\ `_bWVTQQILLQCcLDYHESCFMVHHRGGOGGLGGHGGEGGBGG9je8VT\ ipUXcPKSKcRe_PaWOZSMWOLTKKPGIMCHJxa4pY6hV8aSAUPBNM\ DFJFHZBJ44G77E99CCCAEEhMBWKDKIFhnVahSWbQQXNKRLELIh\ G7cG9ZGAVGBQGCLGDHGECGFiIkaHdUHZNGSFGMhJkZIcQHWHGO\ lpmfkhafdXb`SYXNTSIPODKKyiRBmhAd`9XU8ONM_9JWBHTCFQ\ DCMEAJFlf6ea8ZYASTBLPDEKFhW60cw4Savl3XWAulFdaGhlEh\ q7c3vZ9nUEfQJZLOSHTKCYC8b5E_6KX7QU7WR8aO8gL9mJ9lIC\ lIFlIHlHKlHMlHPlHRdKPXNNQQLITJBWIJUNQTSXRXcQajOfqN\ kxMosKhoIbkGWgEQcCJ_BDkJ7 } frm:F_20160221_1004 { ; Similar to the parallel resistance formula a=real(p1),b=real(p2),d=imag(p1),f=imag(p2), z=0,c1=pixel-p3,c2=pixel-p4: cs=z*z*cos(z)*sin(z), z=1/(1/(cs+c1)+1/(cs+c2)), |z|<100 } -- Mike Frazier www.fracton.org