dc-sdk/modules/material/shader/thirdpart/TieDyeMaterial.glsl

uniform vec4 lightColor;
uniform vec4 darkColor;
uniform float frequency;

czm_material czm_getMaterial(czm_materialInput materialInput){
  czm_material material = czm_getDefaultMaterial(materialInput);

  vec3 scaled = materialInput.str * frequency;
  float t = abs(czm_snoise(scaled));

  vec4 color = mix(lightColor, darkColor, t);
  material.diffuse = color.rgb;
  material.alpha = color.a;

  return material;
}