Plasma has two sets of parameters, depending on the type of plasma you want to generate:
The first type is called Midpoint displacement and works by recursively dividing the area into smaller pieces, displacing the midpoint of the new area.
The second type calculates plasma using a two dimensional fractional brownian motion.
This number directly determines the dimension of the object. The resulting dimension is 3-H, i.e. if H=0.9, then the dimension is 3-0.9=2.1, so it's a rough area. If H=0.1, then the dimension is 2.9, so it's a very rough area.
Because this type works with random numbers and a seed of random numbers is deterministic, (at least if calculated by a computer), it's necessary to define a starting value of this seed. The same value results in the same random-number sequence.
Specifies the standard deviation of the random number generator.
Fractional Brownian Motion
Number of iterations to perform in order to generate random numbers. Higher values produce a more cloudy plasma.
- Angle Step
This value lets you rotate the whole plasma image.
Fractional Brownian Motion relies on generating random numbers. But generating these numbers is quite difficult. This parameter lets you specify a parameter which is used to scramble the random numbers. It lets you change the plasma pattern.
This is an additional parameter used to scramble random numbers between iteration cycles.
Number of drawing passes to perform.