useMetallnessFromMetallicTextureBlue = true Customizing Metallic Surfaces In PBR To switch from the PBRMetallicRoughnessMaterial to the bigger PBRMaterial, a few of the properties need to be renamed (rename has not been done in the richer material in order to keep backward compatibility with prior versions): PBRMetallicRoughnessMaterial In order to setup the PBRMaterial in Metallic/Roughness mode, at least one of the following properties has to be set (else it by default works in Specular/Glossiness): This page addresses the differences between the PBRMaterial and its the simpler versions. PBRSpecularGlossinessMaterial and PBRMetallicRoughnessMaterial, are a good introduction to PBR, however using PBRMaterial itself will allow you to have more control over the material using features such as The two simplified versions of PBR Materials e.g.