Ray-MMD's Water, Noise, fbm

Ray-MMD 부분중 water 부분을 분석하는 중

fdm, noise 라는 부분이 존재

여러 noise function

https://gist.github.com/patriciogonzalezvivo/670c22f3966e662d2f83

fdm에 대한 설명

https://thebookofshaders.com/13/

thebookofshader의 몇몇 shader

random: 아래건 비추. 먼소린지 모르겠고 글이 길다;

https://thebookofshaders.com/10/

https://thebookofshaders.com/edit.php#10/ikeda-04.frag

Test 버튼이 기능이 히한하다

http://www.iquilezles.org/www/articles/warp/warp.htm

https://www.shadertoy.com/view/lsl3RH

https://stackoverflow.com/questions/16999520/in-need-of-fractional-brownian-noise-fbm-vs-perlin-noise-clarification

Ray-MMD's fdm