LVutner

//Sample textures
	vec4 albedo_tex = texture2D(texture, texcoord);
	vec4 normal_tex = texture2D(normals, texcoord);
	vec4 specular_tex = texture2D(specular, texcoord);	
	
//Gamma correction - Optional if you're not doing gamma correct lighting	
	albedo_tex.xyz = pow(albedo_tex.xyz, vec3(2.2));
		
//Normals
	vec3 normal;

patriciogonzalezvivo

Please consider using http://lygia.xyz instead of copy/pasting this functions. It expand suport for voronoi, voronoise, fbm, noise, worley, noise, derivatives and much more, through simple file dependencies. Take a look to https://github.com/patriciogonzalezvivo/lygia/tree/main/generative

Generic 1,2,3 Noise

float rand(float n){return fract(sin(n) * 43758.5453123);}

float noise(float p){
	float fl = floor(p);
  float fc = fract(p);