2D Weyl 4 LDS https://www.shadertoy.com/view/MddGDB 2D Weyl hash #1 (integer) https://www.shadertoy.com/view/MsV3z3

http://mollwollfumble.blogspot.jp/2011/03/subrandom-numbers.html

http://transvoxel.org/

article : http://blog.demofox.org/2016/02/19/normalized-vector-interpolation-tldr/ shadertoy : https://www.shadertoy.com/view/4sV3zt

article : http://blog.imgtec.com/multimedia/ray-tracing-the-walking-dead-and-monster-trucks-at-mwc-2016

http://www.thisiscolossal.com/2016/02/a-3d-printed-sundial-displays-time-like-a-digital-clock/

article : http://www.thisiscolossal.com/2016/02/frozen-lake-superior/

http://zenopelgrims.com/zoic/

https://allegorithmic.com/blog/art-jonathan-benainous

http://80.lv/articles/studying-lighting-in-games/