This page gives some basic details about the Beauty RGB_Color render element and how it may be re-assembled in a composite using its component elements.
Back to Beauty Compositing
The following is the base formula for reconstructing the Beauty pass. Some Render Elements can be excluded if the scene does not utilize them. Click the image to see the full-size version and zoom in to view all the render elements involved.
Advanced Back to Beauty
Occasionally there may be a need for more specific editing to the final image. For this, there's a more detailed workflow than the normal back to beauty workflow. Click the image to see the full-size version and zoom in to view all the render elements involved.
(VRayDiffuseFilter x (VRayRawLighting + VRayRawGlobalIllumination)) + (VRayRawReflection x VRayReflectionFilter) + (VRayRawRefraction x VRayRefractionFilter) + VRaySpecular + VRaySSS2 + VRaySelfIllumination + VRayCaustics + VRayAtmosphere + VRayBackground = RGB_Color (Beauty)