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Questions about Ultra Fractal, sharing of parameter sets (UPRs), and everything else that doesn't fit in the other categories.
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physicist posted Mar 14 at 4:19 pm
I’ve uploaded a new version of jlb.ulb with a new fractal plug-in formula, ThreeLevel. It’s a Barnsley-type formulas; these formulas define a critical value, and at each iteration some combination of z and c is compared to the critical value. If the combination is above the critical value, one formula is used; if below, another formula is used.

ThreeLevel uses two critical values
recent by physicist  ·  Mar 20 at 4:00 pm
physicist posted Mar 7 at 7:49 pm
I have some of the help files that are referenced in online formulas, including ones from lkm, mt, reb, and sam, but I don't have any of the dmj-pub help files. Are all of the help files still available somewhere?

They don't seem to download when I update the formula database.

recent by Velvet--Glove  ·  Mar 9 at 4:21 pm
Encrypted posted Dec 23 '20 at 4:54 pm
From reddit:
Can you please tell me which formula you used for this image?

Same formula for this?

For awhile I was playing around with generated/mutated formulas (using some software I wrote to do the mutation)... These two images were made with a couple of those. I never added any of those formulas t
recent by Phillip  ·  Feb 1 at 7:17 am
physicist posted Nov 10 '20 at 1:55 am
The help file "Rendering the animation" says for compression to use the Cinepak Codec by Radius for Windows. My list of compressions is
Logitech Video (I420)
Intel IYUV Codec
Microsoft RLE
Microsoft Video 1
Microsoft YUV
Microsoft YUV
Toshiba YUV Codec
Microsoft YUV
(Yes, Microsoft YUV is there three times.)
For a
recent by physicist  ·  Nov 13 '20 at 3:24 pm
I have been working for some time on ways to generate new fractal shapes, and also to be able to switch easily from Mandelbrot type (M-type) to Julia type (J-type). Here is what I’ve come up with.
UltraFractal formulas usually depend on two complex values, z and c. Usually z starts with the pixel value and changes throughout the iterations. Usually c does not change with the iterations; for
recent by farmerC  ·  Sep 26 '20 at 7:00 pm
physicist posted Sep 20 '20 at 8:10 pm
I have a square fractal, say 600x600 in the UF6 window. If I change it to 900x600 in the Image tab, the apparent magnification changes. I want to make it wider without changing the center or the apparent magnification. Is there a formula for changing Magnification in the Location tab that will do this?

recent by physicist  ·  Sep 26 '20 at 2:00 am
I'm very pleased to announce the release of Ultra Fractal 6.03 for Windows and macOS today. In addition to bug fixes and small improvements, this update adds full support for Dark Mode on macOS 10.14 (Mojave) and beyond. The update is free for existing version 6 users.

Download here:

Here are the release notes with a full list of changes:
recent by rsidwell  ·  Sep 19 '20 at 7:35 pm
physicist posted Aug 31 '20 at 5:22 pm
It turns out that some combinations of formulas don't render properly unless Periodicity Checking is Off.

A word to the wise ...

physicist posted Aug 29 '20 at 7:33 pm
Example 2 also uses Power as the Initial Formula, but Two Formulas as the Main Formula. Formula #1 is a J-type Lambda, and Formula #2 is an M-type Lambda. Bailout is Divergence. Different bailout types give different results.
SwitchComboExample2 {
recent by physicist  ·  Aug 30 '20 at 5:06 pm
Phillip posted Jul 14 '20 at 1:27 pm

This might be a dumb question, but I wasn't able to figure out where I can share parameters or formulas or other stuff, such that they make it into the public collections. Where do I upload or send them?

Best regards,

recent by Phillip  ·  Jul 16 '20 at 8:14 pm
KathyR posted Jun 11 '20 at 11:10 pm
A favorite coloring of mine in XaoS Fractal Zoomer is one called Biomorph. It changes shape depending on the bailout used. A low bailout such as 8 gives a stubby wider shape and a high bailout results in a more pointed, spike shape. See the pics here. Is there anything similar to this in Ultra Fractal? Jam2.ucl has biomorph and Outside Options under Fractint (Compatibility folder) also has bi
physicist posted May 31 '20 at 1:46 pm
I've wanted to be able to add a vignette (a darkening of the corners and edges) to a fractal as is common in photo editing software, so finally I wrote one. It's Vignette in jlb.ucl.

It's a direct coloring, producing a layer with white at the center and grays to black at the edges. It is meant to be used as a top layer, with Multiply. Here are the parameters:

radius: inside this radius, t
recent by physicist  ·  Jun 11 '20 at 12:40 am
physicist posted May 16 '20 at 6:49 pm
I've added a revised version of QuadMirror to jlb.ulb. QuadMirror2 is a transform that takes a rectangular block from a fractal layer and tiles the fractal evenly with the block, mirroring it both horizontally and vertically.

The user specifies the number of blocks in each direction, the center of the original block, and where the original block goes (unmirrored). Because of the mirroring, t
recent by Liesbeth Quak  ·  May 20 '20 at 1:48 pm
Dint posted Feb 25 '20 at 6:31 pm
I am currently on working on creating some fractals and animating them.

I had a question... I tried doing a fractal animation and it takes about 3-4 days to render and then at the end the log says "Error Saving image (error)

Is there another log where I can figure out what the exact error was?

According to the log it took close to 60 hours to finish so I do not want to go through it
recent by Velvet--Glove  ·  Feb 26 '20 at 11:37 am
KathyR posted Jan 27 '20 at 3:39 pm
Does Ultra Fractal offer any of the lambda fractal planes, as described in this link? I am aware of the inverse fractal mapping but was wondering if any of these others are possible as well?

recent by KathyR  ·  Feb 2 '20 at 1:21 am
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