The Height Modulation is used to add new frequencies to a texture according to a noise scale and an elevation you define.
How to use it?
- Add a Height Modulation Layer
- Set the Bump Amplitude and Bump Scale to get the desired effect
When to use it?
The Height Modulation can be really interesting to give some "volume" or relief to your material. You can use it as soon as your Layers stack outputs an Height.
Sometimes, some materials are very flat and the height modulation can be a good option to build a totally different surface from nothing than a plane.
Here is some examples :
Noise Type: Defines the noise that will be used
Noise Blur Intensity: Defines the intensity of blur applied to the noise
Bump Amplitude: Defines the amplitude of elevation added by the noise
Bump Scale: Defines the scale of the noise. High value will give high frequencies, low value will give you low frequencies.
Inflate Slope: Defines the direction of the inflate effect over the noise
Inflate Bump Intensity: Defines the intensity of the inflate effect over the noise. Useful for natural ground.
Enable Detail Bump: Permits to add a second pass of a fine bump over the base bump.
Detail Amplitude: Defines the amplitude of elevation added by the detail bump.
Detail Scale: Defines the scale of the detail bump. High value will give high frequencies, low value will give you low frequencies.