Linear Approximation for the Smith's Visibility Term for GGX | Desmos

Expression 2: "r" equals left parenthesis, cos left parenthesis, theta , right parenthesis times left parenthesis, 1 minus "a" , right parenthesis plus "a" , right parenthesis left brace, 0 less than or equal to theta less than or equal to StartFraction, pi Over 2 , EndFraction , right brace

0

domain \theta Minimum:

less than or equal to theta less than or equal to

pi / 2

domain \theta Maximum:

2

Expression 3: "a" equals 0.5

0

1

3

4

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