I would like a special brush

[Denis]

Hello
Is it possible to create a brush that can pick up 2 colors at a time, allowing a line in which the 2 colors appear separate or mixed in places, depending on the structure of the brush bristles - in fact, exactly as in oil painting?
Such a brush may already exist, but I'm not familiar with it.
Thank you for your advice
sincerely
Denis

[rich2005]

Gimp is not the best in the world for your request.

There are already standard brushes - bristles - acrylic that you should try using different FG / BG colours and a brush dynamic such as Random Colours or Confetti.

You can make your own animated brush in a Gimp Image Hose .gih format This is an example of that 5 layers - grayscale image - exported as a .gih See the attached, unzip put in the brushes folder.

   

...and in action a 40 second animation. https://i.imgur.com/aiaYEzZ.mp4  Not exactly oil painting. Please have a go at making your own, Gimp is great for experimenting.

For oil painting effect, as an alternative, you might look at the MyPaint program https://mypaint.app/about/ or if you want to spend some cash, something like ArtRage.