One of the most fun apps in my graphic toolbox is rebelle (by escape motion)
I have several graphic programs that emulate natural media, but this is my go to.
It is particularly impressive at simulating watercolor. But it also does a very nice job at emulating pastels and oils.
I often use it to plan my next canvas. The fidelity with natural media allows me to approach my canvas with confidence.
Version 7 is coming out this month. It will now support Apple silicon natively.
There is an incredible discount til December 13!