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Rendering and Compositing a Dust Pass in Maya

I’m doing a quick render to use as the base for a painting and wanted to add some dust to my scene to cover the rubble and earthquake. It’s all pretty draft quality work but notice how quickly a dust layer comped in Photoshop adds a lot of realism to a pretty sparse scene:

The process is pretty easy: duplicate your render layer with everything in it, create a render layer override that sets all your objects to your Lambertian dust material and render. Then you bring it into Photoshop or Nuke and paint in the dust. Add a material ID pass to make object masking easier and you’ve got a great little workflow. Since dust and snow can gather to look a lot like ambient occlusion, you can try using an ambient occlusion pass as a mask while painting in your dust layer:

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  1. polygonspixelsandpaint posted this