Photoshop Actions: Sounds to me like ImageMagick calls on different images or part of images. Or the same with OpenCV. Sure: "Call the process again and again", does not sound as professional as "Photoshop Action" :)

By the way – I personally can't see the advantage of having full fledged Image-Processing inside of Poser. Can you give a practical example?

About OpenCV: There is actually nothing you can't do with OpenCV when it comes to images or videos. From simple things to complicated processes, even AI (recognizing things, faces, people for example). Problem is: it has a very steep learning curve.

But I see the difference – you see image not as a bunch of numbers in a file like I do :)

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