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Add high frequency details: Notion of Fractal
Idea
: Recursively add self-similar details
Simple rule \(\Rightarrow\) complex shapes
May look like complex natural details
Standard
fractals (Mandelbrots, Sierpinski, Newtons's root, etc) are very hard to control.
Not often used directly in CG.
Koch Snowflake
Sierpinski triangle, Shell:Oliva Porphyria
