Picking up underlying color in layers

…Painter's layers can treat underlying colors in…other layers as well as the canvas…as if it were one big happy flat painting made up of wet paint.…This enables smeary and color mixing brushes to…interact with this underlying color in a convincing manner.…However, it is possible to disable this feature.…Let's find out how to control this…important underneath everything is wet layer feature…so I've opened up an image here and…this is available in the exercise folder for chapter…9 its called color bars and we've got this set of color bars on the canvas layer.…

And I've created a new layer and now I want to paint,…and I'm using the real blender round brush from the blenders category.…Let's go ahead and just do a little painting…on this and note that I have a purple here.…So, I going to start to paint, and you'll see that it does apply some color.…But it also, mixes and blends with the color underneath of it.…So, the effect, and what it all looks like, is as if the underlying color bars…were wet paint and then I used a brush that had color on it but also smeared…