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Expression Pattern

Define a pattern as a general mathematical function which will be evaluated for each pixel in the pattern.

Typically includes the variables x and y. The expression can also include variables. All of the standard programming functions are also available (e.g., sin, rand(min, max)...). Dynamic patterns can be generated by including the variable "t" in the expression, which is the current animation time in seconds. The function must be scaled so that it has a range of -1 to +1. 

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Most regions include the following parameter groups:

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