This tutorial follows on from our other video, Using Poliigon textures in Maya with V-Ray.
High quality textures are just the first part of creating realistic, believable materials. In the real world nothing is clean, even the most sterile environment will have imperfections and it's important to replicate that when creating realistic renders.
Smudges:
Create a new image texture node and load in the smudges texture (use the white smudges on a black background), be sure to click on override in the color space options so the gamma is set to 1.0.
Add in Composite node and feed the original roughness map (Inverted Gloss) into the layer1 input, then feed the smudges into layer2.
Add in an invert node and feed in the output of the composite into that. Finally, feed the invert node into the gloss input of the V-Ray Shader.
Insert a RGB Multiply between the smudges texture and the composite.
Adjust scaling via the texture node and strength via the rgb multiply node.
Scratches:
Create a new image texture node and load in the scratches texture (use the greyscale white scratches on a black background)), be sure to click on override in the color space options so the gamma is set to 1.0.
Connect the scratches texture to the bump input of the normal map node that should already be present.
Adjust scaling via the texture node and strength via the normal map node.
Downloads: