Creating a Scratched / Smudged Glass material

1. Glass with Scratches…

BASE LAYER…

• Create a Glossy Layer.
• Use a White color in both Reflectance & Transmittance.
• Select a color for the Absorption. (optional)
• Increase Absorption value based on the object’s size. (optional)

SCRATCHES LAYER…

• Make a copy of the Base Layer (Right-Click & Duplicate)
• Move it at the top.
• Change the Layer Weight to a value of ~10%.
• Load a Scratch map in the Bump Channel and lower the value to something like 10%.

Adjust the scratches effect by changing the Layer Weight of the Scratches Layer.

2. Glass with Smudges

Contrary to scratches, smudges or fingerprints need a different semi-transparent layer on their own.

BASE LAYER…

• Create a Glossy Layer.
• Use a White color in both Reflectance & Transmittance.
• Select a color for the Absorption.
• Increase Absorption value (depends on the size of the object).

DIRT LAYER…

• Create a Basic Layer.
• Select a bright color for the Diffuse Channel (not over 220,220,220)
• Load the Dirt Map in the Layer Weight and adjust the percentage.
• Select White for the Reflection Channel.
• Increase Roughness to 25%.

Adjust the scratches effect by changing the Layer Weight of the Scratches Layer.