Bug Reports and Feature Requests
For Ultra Fractal bug reports and feature requests.
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Some formula writing would be easier if the Formula class in common.ulb had in its protected area

complex m_c
and functions like

func SetC(complex c)
m_c = c
complex func GetC( )
return m_c
Including these changes would not break any current fractals and would allow simpler switching from Mandelbrot-type to Julia-type.

recent by physicist  ·  4 days ago at 6:20 pm
physicist posted Sep 1 '23 at 8:14 pm
With some of my recently changed formulas I've run into a problem. Here's a screenshot illustrating the problem:

The red bars should not be there. If I reload the fractal, the bars are different but still red. I also get different red bars with and without anti-aliasing, and different red bars when rendering. This image is with min and max threads of 20, the max on my system. With fewer
recent by physicist  ·  Jan 12 at 2:49 pm

I ran into a bit of a headscratcher today when moving a commented line changed the output of my fractal formula. I eventually figured out that I had two comments, the first of which was a line ending in \ (the continuation character), and any line following a comment which ends with \ is not executed.

While this kind of makes sense when thinking about it (i.e. the current command c
recent by Frederik Slijkerman  ·  Jan 10 at 9:21 am
dint posted Nov 10 '22 at 10:32 pm
I am going through the UltraFractal help

Combining fractals with Images.

And I get to this step:

"Locate the Color Trap plug-in parameter (currently set to Trap Shape Wrapper) and click the Browse button next to it. Navigate to the common.ulb file in the Public folder and select the Image Trap plug-in."

As soon as I click on Public->common.ulb

I get the follo
recent by dint  ·  Jan 4 at 4:01 pm
physicist posted Dec 14 '23 at 8:54 pm
I found three instances in plug-in library classes that the compiler misses errors and the class doesn't show up as a plug-in.

I wrote clas instead of class
I left off the ) before the { on the first line
I left off the final } of the class (this only when the class is the last one in the ulb file).

If I leave off the initial {, the rest of the class shows up as a comment, so the error is e
recent by Frederik Slijkerman  ·  Dec 31 '23 at 11:36 am
Has anyone heard of this old software called ChaosPro? There is a feature that allows the generation of hypercomplex, octonionic and quaternionic fractals. I wonder if something like that can be possible in Ultra Fractal in the future, as a means to learn more about them. Is it possible to add these in a future update, and adapt perturbation theory, series approximation and bivariate linear appro
recent by Alexandre Vachon  ·  Dec 21 '23 at 5:01 pm

I am not sure whether this is a feature I missed or a bug, but I noticed my monitor not turning off over night recently and tried to figure out what was happening. I used powercfg /requests as admin to see what was preventing it and it turns out it is UF.
Is this intended behavior?

There was nothing rendering, but there were 7 fractals and 2 formula files open at the time.

recent by Phillip  ·  Dec 5 '23 at 2:06 pm
Phillip posted Aug 28 '23 at 8:10 pm

I've seen this several times now with different fractals, and I don't know what causes it, but sometimes multi-layer fractals are offset. This problem seems to go away when activating anti-aliasing in the working window. Here's a screenshot:

It seems to be always exactly 1 pixel along the y-axis of the monitor, no matter the rotation of the fractal. And it also remains 1 pixe

there is a behavior of UF that I do not see in most other software: the window focus seems to apply to all open windows. That means if my monitor is plastered with UF windows and I click one, the entirety of UF is instantly in the foreground, that is the window that I clicked and all others as well.

Sometimes I want one small window open while looking at something else, it would be
Ok, this might be a bit of a weird one, but I just managed to produce a problem that I've been meaning to reproduce for a while now:

Sometimes, when I and rendering something to disk while the preview is still also rendering, all UF windows start flickering erratically and the program becomes all but uncontrollable. In most cases I can somehow hunt down the window in question and close it or
recent by Velvet--Glove  ·  Sep 22 '23 at 6:19 pm
I've been playing around with the animation feature lately and have been attempting some fairly simple Mandelbrot zooms at low magnification. I created an AVI file for a 15 second video (both 60fps and 30fps) at 3840x2160 resolution, but when I tried to load it up I get an error that the video file is unplayable due to possible corruption. I attempted to play the file under 4 different media play
recent by zalasur  ·  Sep 22 '23 at 1:57 pm
MinersHavenM43 posted Jul 29 '23 at 5:26 pm
When changing parameters, the image only updates after you change it again, after which the image will show the image with the previous parameters.

For example, starting with a power 2 Mandelbrot, changing the power to 5 will not update the preview, and changing it to 10 will update the preview to the power 5 Mandelbrot. Changing the power to 15 will update it to a power 10 Mandelbrot.

recent by Frederik Slijkerman  ·  Aug 13 '23 at 11:44 pm
Request: Better control over periodicity checking.

Currently, periodicity checking is controlled by a limited set of options: "off, rough, normal, conservative". I don't know how it is implemented, but I am guessing some orbit distance threshold preset table or similarly.

I work with fractals that are very sensitive to the periodicity checking, yet turning it off altogether would real
recent by Frederik Slijkerman  ·  Jul 21 '23 at 7:43 am
Clark posted Jul 13 '23 at 3:54 pm
Eval mode on v601 worked fine, but I just bought v605 and now there is no animation menu or timeline on v601 and v605. Anyone else have this issue? Any fix? MacOS 10.14.6

physicist posted Jun 25 '23 at 7:25 pm
When I'm browsing formulas, it's very helpful that UF calculates and shows thumbnails of each possible formula.

There are also drop-down lists in many formulas, such as the built-in Function list (sin, sinh, asin, ...). It would be very helpful if UF could show calculate and show thumbnails of each choice.

Not easy to implement, but as long as I'm dreaming ...

recent by Frederik Slijkerman  ·  Jun 28 '23 at 3:00 pm
physicist posted May 31 '23 at 1:52 pm
The ResultIndex function of a GradientColoring formula returns a value for #index, an index into the gradient. The #index has useful values from 0 to 1. If #index is outside [0,1], 0 is used.

If Repeat Gradient is checked, positive values greater than one are reduced to [0,1]. For example, 3.7 becomes 0.7, which is in range. However, negative values of #index are still replaced by 0.

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