The Noise Falloff
This is an additional falloff for particle modifiers. Its use is not restricted to X-Particles; it can also be used elsewhere in Cinema 4D if required.
The falloff appears in the Falloff tab of any object in Cinema which can use falloffs, including Fields. To use it, select 'xpNoiseFalloff' from the 'Shape' drop-down menu in the Falloff tab or the 'Type' menu of a Field object. The available settings are shown here:
This falloff returns a value obtained by sampling a noise function. Instead of the smoothly variable falloff value which is returned by other falloff types, the value returned can vary widely over small distances.
This drop-down has three options:
The falloff is not restricted in size but works across the entire 3D world (equivalent to choosing 'Infinite' from the 'Shape' menu).
The falloff has the shape of a box. Its size can be adjusted with the drag handles in the editor, or by changing the 'Size' values in the main falloff tab.
The falloff is spherical. Its size can be adjusted with the drag handles in the editor, or by changing the 'Size' values in the main falloff tab. Note that only the first of the 'Size' values has any effect, the others are not used.
The seed value for the noise.
This drop-down lets you select the noise type to use. These are the standard noise types you will see elsewhere in Cinema 4D.
Enable this switch for 2D sampling of the noise. Disabling it will result in 3D sampling.
The sample radius used when sampling the noise.
When checked, the turbulence will repeat itself over a period of time. The time taken to repeat is controlled by the 'Repeat Interval' parameter.
If 'Periodic Variation' is checked, you can select how often the noise repeats with the 'Repeat Interval' drop-down ('Turbulence' noise type only). The smaller the number, the shorter the time between repeats.