Here is my first attempt at script-fu.
This script produces Turing-like patterns, with two parameters to change the aspect of the patterns and the possibility to either create a new layer from scratch or to create the pattern from an existing layer.

Perhaps a thing I would like to improve about this script is to give it a working progress bar; I cannot get it to work for the moment, so any suggestion is welcome.

NOTE: this script need another script, Rob Antonishen's high pass filter, to be installed. As a new user I cannot provide a link to this script so you will have to find it by yourself.

Thank you, i was looking for a way to make a turing pattern a few weeks ago after watching a video on YT by Nobu Design.
The only thing i could find was something by samj but the results were always blurry (and the plug-in is kind of slow).

I tested your script - in 2.8 i got an error and in 2.10 nothing happens at all. The script runs and leaves the layer in the state it was at the start.



You should probably also tell us in your first post that your script requires RobA's high pass filter script to be installed, because most of us dont look at the code.

I get:

Error while executing script-fu-turing-pattern:

Error: not enough arguments

This is in 2.10.20 and I have Rob's high pass script. The high pass script works fine on it's own.

Sorry everybody, I forgot to tell that my script require's Rob Antonishen's high pass filter to work. I now edited the original message.

The errors mahvin and myself got, have nothing to do with the high-pass script.

I have Rob's High pass version 1.2 script and It's working on my end as long you don't tick off "Create a new layer?".

It doesn't work on the active layer

All these scripts are open-source, it is totally legitimate to steal the useful bits of code from RobA's script and include them in your code (but you have to understand how they work) as long as you credit RobA, and publish your scripts with an equivalent licence.

Nice to have Turing Pattern on Linux.

Nice script

@Nidhogg - there is one for linux

Thanks heaps rich! Your Gimp chest must contain pretty much everything

Thanks rich. Using the "Protoplasm" option makes for a good bumpmap to use on bricks or stucco.

Konstantin:

Swap the file you have with this one:

I am investigating the error reported by Konstantin and Pocholo (it seems to be the same problem, while Mahvin's error seems different). The difficulty is that I cannot reproduce this error; on my computer (windows 10, GIMP 2.10.6) everything works fine. I will try to update my version of GIMP (since it is not the latest) to see whether I can reproduce this error.

The error regarding gimp-drawable-threshold being unbound suggests that there is no procedure named "gimp-drawable-threshold" in the pdb. Could you check this, Konstantin? (filters > script-fu > console > browse, then look for a function named gimp-drawable-threshold). Pocholo, is it the same error message that you get?

I don't get any errors. It's just the script go through the motions and leave the background layer as it was in the beginning. It doesn't produce anything.

This the 15 second running script video.
https://imgur.com/a/EO4m6mR

Just for reference, the same thing happens to me when I uncheck the Create New Layer box.

I upgraded to the latest version of GIMP (2.10.20), and the script still runs fine whatever the input parameters on my computer. I also confirm that the high-pass script sent by Mahvin is perfectly identical to the one I use.

Mahvin, Pocholo, based on the video you sent, I think I understand the issue; you call the script from a totally white layer don't you? (is it what you do also, Mahvin?). Try to fill the layer with something (for example, solid noise, or even just that good old green pepper brush). Indeed, Turing patterns emerge from the fact that some matter (= pixels with non-zero value (ie non-white)) diffuses and reacts inside a medium (= the canvas), but if there is no matter in the first place, no pattern can be formed.

Amazing! Using certain pattern fills creates some very unique and bizarre Turing patterns.

Good to know, holojello I like it. Make sure you inform users about it.

Yes, its there.


I was somewhat able to fix the problem.
It worked after i installed the high-pass file provided by mahvin. The reason it wasnt working is because i had edited my version of the script so it appears under "Enhance" instead of the "Generic" category.

However: it still doesnt work when "Create new layer" is unchecked. That will only produce a white layer.

May i suggest, adding the High Pass filter code to your Turing script ?!

Konstantin, read the posts above yours. Or just fill that white background with a texture, then run the script with layer unchecked.