torridgristle
commented
5 years ago Edit isn't working.
The math attributed to Inigo Quilez is actually Ken Perlin's work and SmoothestStep which was attributed to aliaspider was an example from the Smoothstep Wikipedia page. https://en.wikipedia.org/wiki/Smoothstep
Inigo Quilez's Improved Texture Interpolation x x x (x (x * 6.0 - 15.0) + 10.0) http://www.iquilezles.org/www/articles/texture/texture.htm
aliaspider's SmoothestStep x x x x (x (x (-20.0 * x + 70.0) - 84.0) + 35.0) https://github.com/libretro/glsl-shaders/blob/master/retro/shaders/smootheststep.glsl