This page gives an overview of the two global illumination render elements that may be created through V-Ray and how they are used in compositing.

 

Section Contents

Page Contents

 

Overview


Global Illumination is the indirect lighting bouncing around within a scene to contribute to the overall illumination, as opposed to direct lighting from a light source.

The Global Illumination Render Elements store indirect lighting information calculated in the scene. The following passes may be generated:

 

The Global Illumination render element itself (vrayRE_GI) can be used in Back to Beauty compositing to add in the GI lighting contribution to the scene. The GI contribution may be adjusted (tinted, brightened, darkened, etc.) in the composite as needed without the need to rerender the scene.

When even more control over the GI contribution to the final image is desired, this main Global Illumination Render Element can be re-created by multiplying the Raw Global Illumination Render Element with the Diffuse Render Element:

vrayRE_Raw_GI x vrayRE_Diffuse = vrayRE_GI

 

 

Render Element Examples



 

Notes  


  • When Raw Global Illumination is needed in the composite, please make sure to also render the Global Illumination pass (vrayRE_GI) as well as the Raw GI pass (vrayRE_Raw_GI) itself.