How to make a scale map work?

[Millani]

I don’t really understand the problem, since the region marked in the picture does not seem dense at all.

I suppose what you’re seeing is similar to this:

The uniformity of combined prcedural textures

[combined] I believe the above image explains my dilemma. I have two uniform textures that I combine, and somehow end up with a texture that depends on location. I would like to have some insight on why this occurs.

The scale input is just a factor for the input vector. This has barely any effect when close to the origin (0,0,0), but has a stronger effect further away.

Also, I’m not sure how well voronoi works with variable scale. Did you try using something simpler like the wave texture for testing?