Making Mattes easier for Arnold to Nuke

When rendering in CG be that in Arnold, Vray, Renderman or another renderer it is often necessary to create ID mattes. ID mattes are used to “pull keys” on areas you would want to adjust latter on in post-production for example altering the colour or saturation of an individually rendered element.  Traditionally you only had a choice of either red, green, or blue as you need pure colors.  Once you have used three matte channels you would then need to create a new render for more matte areas. The Current method of creating mattes involves assigning red, green and...

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