loki1950 wrote:Freckles are just pigment in the skin they do not have height at all so putting them on a displacement map is just wrong.
I had no intention of doing so.
I was trying to picture how the freckles were distributed and was thinking back to another thread where someone used a random texture to generate a sort of mountainous terrain, and then picturing that if you were to place a plane such that only the tallest peaks poked through it, and took areas on the plane intersected by the peaks you might get something like random freckles, depending on the properties of the random surface. It's just the thought that came to mind seeing the color ramps.
With these nodes
The scale in the noise node determines the size of the freckles
- Scale of 5 on the left, 50 on the right
As the upper stop is lowered only the darkest spots remain, the darkest spots being the peaks in my metaphor
The greater the reduction the fewer, farther apart, and smaller they will be
Raising the left stop will increase contrast and reduce variation in intensity. Scale and the two stops can be adjusted as necessary to get the desired size, spacing, and darkness
As in the other thread, I'm writing this all out like this to improve my own understanding.