Dirty Glass

To create a dirty glass material, we will use two layers. The first one is the Glass layer and on top of that we will be adding a Basic layer for the dirt. To blend those two layers together we will use a surface imperfection map.

Glass Layer

  • Create a new material and change the default layer (Basic) to Glass
  • Load the surface imperfections map to the Roughness channel and increase the roughness value

Dirt Layer

  • Click on the plus icon to add a new layer on top
  • Change the Diffuse color to near white (220,220,220) to simulate the color of dust
  • Click on Layer Weight and add the same texture. This will be used to mix the two layers together
  • Adjust the Gamma/Contrast/Brightness values to finetune the weight map.
  • If the look of the dirt layer is too strong, reduce the layer's weight percentage to your liking.

Download Dirty Glass Material
Credits: Using textures from CG Bookcase