Corel Painter is fogging up

I'm experimenting with both the X3 and the 2019 versions of Painter. Something weird is goin' on. When I release the mouse button after completing a stroke, the stroke starts to blur and fog.

Almost as if I was painting with watercolor and I was applying paint to a wet piece of paper. In other words, the paint is blooming.

Don't know why or how to fix this.