Reply To: How does the color ramp affect the noise texture (technical background)?

[spikeyxxx]

Not using a Colorramp would mean that black from the noise would be black (disregarding the Brightness here).

This would be the same as using a Colorramp with the black having an Alpha of 1. (Like your standard Shader Editor Colorramp.)

But, because this Colorramp has its black with an Alpha of 0, this means that darker values from the Noise Texture are more transparent than light values.

The color of your Brush comes after the colorramp! Here is an example of painting without (left side), compared to with colorramp;

the top is with a red Brush and the bottom with a black one:

So the order is: Noise > Colorramp > Brush.

Hope this helps.