 
 MaterialInfo getIorInfo(MaterialInfo info)
 {
-    info.f0 = vec3(pow(( u_ior - 1.0f) /  (u_ior + 1.0f),2));
+    info.f0 = vec3(pow(( u_ior - 1.0f) /  (u_ior + 1.0f),2.0));
     
     return info;
 }

#endif

#ifdef MATERIAL_METALLICROUGHNESS
    materialInfo = getMetallicRoughnessInfo(materialInfo, materialInfo.f0);
#endif

#ifdef MATERIAL_SHEEN

#endif

    // Achromatic f0 based on IOR.
    vec3 f0 = info.f0;

    info.albedoColor = mix(info.baseColor.rgb * (vec3(1.0) - f0),  vec3(0), info.metallic);
    info.f0 = mix(f0, info.baseColor.rgb, info.metallic);
