The Stingray physically based shader (PBS) respects the laws of physics and energy conservation. It allows you to balance diffusion/reflection and microsurface detail/reflectivity through the use of roughness, normal, and metallic maps.
To create a shader graph with a Stingray physically based shader:
The Stingray shader uses the same graphic editor as ShaderFX networks.
By default, the ShaderFX editor opens a standard, preset Stingray network. The Stingray output node is the Standard Base node at the right.
The first time you click a node in the Stingray network, 3ds Max warns you that you are editing a preset, and asks whether you want to change the preset itself, or to create a new and different Stingray shader.
This message appears whenever you try to change the graph of any preset, whether it be a custom preset, or the default one provided with 3ds Max.