---
title: "Using Material Layers"
canonical: "https://rmanwiki-26.pixar.com/space/RFH26/19268357/Using%20Material%20Layers"
format: markdown
---
![image](media://23f8928b-7a84-4c39-97c5-979367bf516b)

  


You can find out all the details of PxrSurface and its layerable parameters by visiting the [Pixar Surface Materials](https://renderman.atlassian.net/wiki/spaces/REN26/pages/19661411).


  


### PxrLayer

We can override the parameters in [PxrSurface](https://renderman.atlassian.net/wiki/spaces/REN26/pages/19661415) using the [PxrLayer](https://renderman.atlassian.net/wiki/spaces/REN26/pages/19661459) options. 

In this example, we set a green diffuse color in PxrSurface. Then we layer a PxrLayer node on top that has a cyan diffuse color. Note that one color covers the other, so we need to alter the Mixer node.

### PxrLayer Mixer

  
We can layer specular, iridescence, and other illumination lobes.


![diffuselayerrender.png](media://c597d240-cb5e-4d5d-8e2f-f0219224eeeb)