Old Man 4K Head Render, Model provided by: (Eat3D) So Aov's (Arbitrary Output Variables) work like render layers in other renderers, allowing you to render out certain layers in order to tweak a render to an individuals liking. Beauty Pass The Beauty Pass is all of your other layers at work put together, to the ambient occlusion, specular another layers will all come together in order to make your final render. In render settings you can choose what layers you can render and which one to leave out, so ambient occlusion, diffuse direct, diffuse indirect, specular direct, specular indirect, SSS (Sub-Surface-Scattering) direct and SSS indirect will be the other layers used to create this image. These are not all the Aov's, but these are the main ones. Diffuse Direct Pass Diffuse Indirect Pass Specular Direct Pass Specular Indirect Pass SSS (Sub-Surface-Scattering) Direct Pass SSS (Sub-Surface-Scattering) Indirect Pass ...