Here are some examples of render elements and their combinations. Note
that the original elements were generated by VRay on one pass (no
Normally, render elements are added to each other in order to reproduce
the final result; however, there are a few exceptions:
the Raw GI and Raw
Lighting elements must be multiplied by the
Diffuse element before they are added to the final image.
the Shadow element is not, strictly speaking,
a part of the image; however, it can be added to the Raw
Lighting element to adjust the shadow intensity. Simply adding the
two elements produces lighting as though no shadows were computed.
Also note that multiplying the Raw GI element
by the Diffuse element will give the
Global Illumination element; multiplying the
Raw Lighting element by the
Diffuse element gives the Lighting
element. This gives the user more freedom for adjusting the scene lighting.
Real RGB color; notice the worse antialiasing on very bright parts
(the area light and its reflections)
Direct Lighting only
Global illumination only
Diffuse color only
Shadows only; note the aliasing at the box shadow - this is because
the RGB Color channel does not require more samples in that area
Raw GI only
Raw lighting + shadows (added); the resulting illumination is as
though shadows were turned off.
Raw lighting * diffuse (multiplied); the result is the same as the
Direct Lighting only channel
Raw GI * diffuse (multiplied); the resuilt is the same as the GI
Self-illumination + Direct lighting + Global illumination +
Reflection + Refraction (all added); the result is the same as the
Real RGB Color channel