You can create and assign a physically based shader that respects the laws of physics and energy conservation. The Stingray PBS (physically based shader) node lets you balance diffusion/reflection and microsurface detail/reflectivity using roughness, normal, and metallic maps. To create a Stingray Physically Based Shader Do any of the following: Right-click an object and select Assign New Material, then select Stingray PBS from the Assign New Material window