I'm not sure what this isn't a thing, when using the explorer I can press escape to exit, but when I'm in eyedropper mode, this doesn't work. It should be straightforward to add this and would make it a lot more convenient.

best regards,

JVYV posted Sep 1 at 11:09 am
Hi all,

You can find the two new fractals of 202108 at the cloud of Microsoft:

Greetings from Belgium,

Jan Vyvey

I have updated my Distance Coloring plug-in (in jlb.ulb) in several ways.

New distance plug-ins:
Gaussian Integer, similar to the coloring in Standard.ucl. This often gives interesting results when used only on early iterations.
Triangle, like Circles or Square, color according to whether z is inside or outside.

Modified plugin:
Exponential Smoothing, with addition
recent by Frederik Slijkerman  ·  Sep 1 at 8:34 am
grfractals posted Jul 24 at 3:51 pm
Hello, i'm a uf6 apprentice and I have a question.

I'm testing and studying Kerry Michell tutorials
As you can see, my image is not as perfect as the image obtained http://www.kerrymitchellart.com/tutorials/basket/basket.html

I have made a copy and pasted of the upr of kerry and I have rendered, then I have compared both images and mine imge has defects. because?

you can
recent by Frederik Slijkerman  ·  Aug 16 at 7:25 pm
physicist posted Aug 12 at 8:50 pm
I have uploaded new Distance Coloring plug-in files to jlb.ulb. These are similar in concept to Orbit Traps: for each iteration, as the z associated with a pixel moves in the complex plane, information can be accumulated about distances. Afterwards this information is used to calculate an index into the gradient for coloring. See a sample image and a upr in the following post.
Load the upr in
recent by Frederik Slijkerman  ·  Aug 16 at 7:22 pm
JVYV posted Aug 1 at 10:03 am
Hi all,

You can find the one new fractal of 202107 at the cloud of Microsoft:

Greetings from Belgium,

Jan Vyvey

dint posted Jul 7 at 5:19 pm
I've created serveral animations where I create with outputing slides to png's.

Though I noticed sometimes if I make a zoom animation too fast... the slides look blurry. Are there any tips anyone can give as what is a good "time frame" so the zoom is not too fast ratio to time so it wont look blurry?

I hope that makes sense.

I can upload a few frames if it helps.

Thanks in adva
recent by Frederik Slijkerman  ·  Jul 7 at 7:42 pm
gerrit posted Jul 1 at 3:46 am
This coloring UCL file is supposed to detect period of an orbit, and assign color index accordingly. Testing on plain mandelbrot set gives a noisy result (can't attach image here I guess, any color map, linear 0.1; values are in 0-20 range). I can see nothing wrong with the code and I have turned of guessing, normal periodicity checking, messed with tolerance, max iters, even tried extra decimals
recent by rsidwell  ·  Jul 2 at 6:30 pm
Phillip posted Jun 16 at 5:19 pm

over the last years I have spent quite a bit of time thinking about how to render my fractals in the best possible way. I'm quite sensitive to image quality, at least I think so, since I'm often the only one to complain about it in the first place.

Just recently I found a great way for getting phenomenal results that doesn't include any costly software, it uses the completely free
recent by Phillip  ·  Jul 1 at 11:29 am
JVYV posted Jul 1 at 10:01 am
Hi all,

You can find the five new fractals of 202106 at the cloud of Microsoft:

Greetings from Belgium,

Jan Vyvey


I upgraded to UF 6.04 today and every time I open the explorer window for any parameter I get a huge CPU spike. This happens even if my mouse is nowhere near the window and nothing else is rendering. This takes several seconds and despite having a 12C/24T CPU it drains my computer of resources to an extent that even the playback of windowed Youtube Videos starts to stutter.

Oddly e
I'm happy to announce the release of Ultra Fractal 6.04. This free update for existing version 6 users fixes several issues on Windows and Mac, especially when running on macOS 11 (Big Sur). You can download it here:

Just let me know if you experience any problems with the update.

Note: because these downloads are new, Windows 10 might flag them a

I’m new to this list but about 20 years ago I was a member of the UF Mailing List for a while together with my former wife Sharron. We had a fractal website called “Fracternity”, and maybe here’s the one or other fractal veteran remembering us vaguely. I have stopped making fractals for a long time, but now my interest is back, and in order to render one of my old
recent by Velvet--Glove  ·  Jun 19 at 4:35 pm
physicist posted Jun 16 at 8:19 pm
I’ve uploaded a new version of jlb.ucl with three new coloring formulas.

Decomposition2 is a generalization of Decomposition in dmj.ucl, by Damien Jones. It colors by the angles of #z, or of one of various functions of #z, at each iteration.

Statistics2 is a generalization of Statistics in lkm.ucl, by Kerry Mitchell. It colors by various statistics of #z, or of one of various funct
recent by Velvet--Glove  ·  Jun 18 at 8:46 pm

this one might be a low priority one, but it's something I noticed and thought I should let you know. From what I can tell, UF uses image pixel column count to separate the image into pieces that are being worked on by each thread. This works fine in almost all cases, but I encountered something interesting. If only a small area is left for calculation, and it is comparatively narrow,
recent by Phillip  ·  Jun 14 at 7:31 pm
physicist posted Jun 6 at 2:02 pm
This is an example of what has happened to me any number of times while developing plug-in formulas.

I changed a couple of parameter names in a plug-in. When loading an old upr, I got this message:

The mistake is actually in a plug-in of a plug-in of a plug-in, but the error message refers only to the top-level formula, which is not in error. The missing parameters are not in the top-
gerrit posted Mar 24 at 7:41 pm
This fractal has "dirt" on it (speckles). If you zoom in on the mandelbar the noise pattern changes so it's not correct. I tried everything with bailout and even added precision but the problem remains. Actually with added precision the picture completely disappears.
I guess I can't attach here, so I'll give upr and Bugs.ufm below,

/>bug1 {
recent by Frederik Slijkerman  ·  Apr 23 at 8:37 am
JVYV posted Apr 1 at 10:10 am
Hi all,

You can find the five new fractals of 202103 at the cloud of Microsoft:

Greetings from Belgium,

Jan Vyvey

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

last week i got an error when I tried to start UF version 5. I had been planning to upgrade to version 6, and I thought this might solve the problem, but it persisted following the new installation.

Liesbeth posed basically the same question in January.

Liesbeth Quak
https://www.ultrafractal.com/forum/index.php?u=/user/profile/10posted Jan 5 at 3:52 pm

She was able to fix

I'm on a roll, so here's a 3rd post. I have intermittently run into an error message when using the explorer to vary color density. This happens when something else (preview or job) is also rendering at the same time. As I move the mouse back and forth over the explorer window, errors occasionally pop up, usually complaining that something is not a floating point value:

recent by Phillip  ·  Feb 22 at 4:10 pm
physicist posted Feb 18 at 3:14 pm
In the Formula window, bool params have their caption to the right of their check box. If the check box were to the left of the window, there would be room for a longer caption to be visible.

A very minor request for the next minor release.

Thanks to Frederik for this terrific program.

recent by Frederik Slijkerman  ·  Feb 19 at 10:33 am
physicist posted Jan 10 at 7:53 pm
I tried changing fonts in the formula editor from the default Consolas to something else, like Times New Roman or another serif font. These other fonts are not mono-space, but they display as if they were mono-space, fixed-width and ugly, so not really usable. Of the Windows fonts, only the true mono-space fonts—Consolas, Courier New, and Lucida Sans Typewriter—are useful.

Not a b
recent by Frederik Slijkerman  ·  Feb 16 at 9:06 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
JVYV posted Jan 31 at 3:16 pm
Hi all,

No new fractals this month.

You can find all the 1998 - 2020 collections at the cloud of Microsoft:

Greetings from Belgium,

Jan Vyvey

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