This page gives an overview of the Raw Global Illumination render element and how it may be used in compositing.
The Raw Global Illumination Render Element stores how much indirect lighting (reflected diffuse light) is received by surfaces in the scene. This raw element is useful for fine-tuning indirect lighting in the compositing process.
The Raw GI pass is untouched by the diffuse colors of the scene and represents the pure indirect lighting contribution. You can use this raw element to reconstitute the GI by multiplying Raw GI with the Diffuse.
This raw render element must be rendered along with the Global Illumination element (Gl) for proper results.
||out Network|| > V-Ray Render Elements node > V-Ray > Render Channel > Color Channel > Type > Raw GI
The parameters for this render element appear in the V-Ray RenderChannelColor render channels node.
Denoise – Enables the render element's denoising, provided the Denoiser render element is present.
Consider for Anti-Aliasing – When enabled, anti-aliasing will be used where possible.
Color Mapping – When enabled, the Color Mapping options in the render settings will be applied to the current render channel.
Derive Raw Channels – Generates data in the raw channels by combining the respective color and the filter color channels.
VFB Color Corrections – Applies the post render color adjustments made from the VFB.
This render element is not supported with V-Ray GPU rendering.
Once the scene is rendered, the Raw Global Illumination Render Element is useful for changing the appearance of indirect lighting in a compositing or image editing application. Below are examples of its use.
Raised Raw Global Illumination Render Element
Raised and tinted Raw Global Illumination Render Element
Tinted and Brightened GI
Underlying Compositing Equation
When Raw Global Illumination is needed in composite, please make sure to also render the Global Illumination render element (vrayRE_GI) as well.
- This render element is not supported with V-Ray GPU rendering.