About Polybrute's “Noise > VCF 2”

Hello there!
There is a knob on Polybrute on the “Filter fm” section called “Noise > VCF 2” that is outstanding. I want to know what exactly does if want to use it also with the soft synths. Is there anyone who can help me? Thanks!!!

It makes Noise directly modulate the ladder filter cutoff frequency. The result will also depend on Noise Colour which changes the noise type (from red to white to blue).