I'm somehow surprised why not more people answer here... I seem to be the only one finding it strange that in AR oil and water mix so well as though in reality
it does not.
do you mean watercolor with acrylic paint?
In AR water color mixes quite well with oil...
Also like I said above, thinners in oil does not make the oil paint "run" as physical paint... so that's why I use watercolors instead of much thinners to blur the oil paint in places.
Ok I just posted the image as an example for instance where I mix watercolor in oil here:
https://forums.artrage.com/showthrea...221#post519221
(the image is not quite finished... )