Vestmann - The shader you see in the skin ball above is one I built in a couple minutes, rendered, and then deleted. When you make shaders every day for 5 years, there isn't any point in keeping them.

However, it was built up using the 3-node building block you see above, where I used the Freckle Mask.

You build a node (or nodes) that produces some effect. You plug that into a Blender, second value. The first value should be what to use when the effect is off.

Then you connect the mask or control map or whatever to the blending value of the Blender.

For two effects, you run them in series. Take the output of the first effect as the base input of the next effect. That's how I made the skin ball. There was the base color going into the first effect. That effect was a small Spots node with some pink spots. The next effect was some veins made with a vein map. The next effect was freckles, which are larger Spots that are orange-yellow.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)