MaetDol

// Created by inigo quilez - iq/2013
// License Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.

// Volumetric clouds. It performs level of detail (LOD) for faster rendering

float noise( in vec3 x )
{
    vec3 p = floor(x);
    vec3 f = fract(x);
	f = f*f*(3.0-2.0*f);