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

uniform samplerCube cubeMap;

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

  vec3 normalWC = normalize(czm_inverseViewRotation * material.normal);
  vec3 positionWC = normalize(czm_inverseViewRotation * materialInput.positionToEyeEC);
  vec3 reflectedWC = reflect(positionWC, normalWC);
  material.diffuse = textureCube(cubeMap, reflectedWC).channels;

  return material;
}