سوال ۲۲ کنکور ارشد علوم کامپیوتر ۱۳۹۷

PASSAGE 2 (excerpt): "In three-dimensional computer graphics, fractal techniques have been used to generate terrain models and the easiest techniques involve subdividing the facets of the objects that consist of triangles or quadrilaterals. ... Most subdivision algorithms are based on a formulation by Fournier, Fussell and Carpenter (1982) that recursively subdivides a single line segment. This algorithm was developed as an alternative to more mathematically correct, but expensive, procedures suggested by Mandelbrot. It uses self-similarity and conditional expectation properties of fractional Brownian motion to give an estimate of the increment of the stochastic process."

Compared to the procedures suggested by Mandelbrot, subdivision algorithms ___________.