Illustrator sub-folder in Photoshop install directory

[George35626511ufer]

On the Adobe support site
https://helpx.adobe.com/photoshop/using/creating-patterns.html

Under the section "Define an image as a preset pattern", Adobe claims that:
Photoshop comes with a set of Illustrator format files that you can use to define a preset pattern.

I went looking for those Illustrator files in the Photoshop folder, and there is an Illustrator sub-folder in that directory tree. What I found there appear to be plug-ins, so I am wondering what those are for and if they need to be activated in Photoshop somehow before we can use them. My first guess is that those plug-ins provide some Illustrator features from within Photoshop. Are you familir with that folder and what it's about?

[c.pfaffenbichler]

What is the location of that folder? 

[Semaphoric]

In (on Windows) C:/Program Files/Adobe/Adobe Photoshop 2024/Illustrator, there are two sub-folders, Additional and Required, each with a Plug-ins sub-folder.

[c.pfaffenbichler]

Ah, that seems to have no directly recognizable equivalent on Mac. 

[Jeff Arola]

Maybe those Illustrator plugins have to do with the importing of Illustrator layers as a psd file into photoshop, a relatively new addition to Photoshop.

https://helpx.adobe.com/illustrator/using/use-illustrator-artwork-in-photoshop.html

As far as the set of Illustrator format files referred to, Adobe must be talking about the PostScript Pattern ai files that shipped with Photoshop until CS4, along with the action one could use to make those PostScript files into patterns that could be used in Photoshop with a Pattern Fill layer.

I don't see any Illustrator format files in the current photoshop 2024 (ps version 25.5) install on either Windows or Mac.

Photoshop 6 pdf describing the included actions

section on the PostScript Patterns action from the Textures action set

the PostScript action and associated ai files in the PostScript Patterns folder

after action has been used to make patterns from the ai files that can be then used as a Pattern Fill layer