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The Light Analysis Render Element provides a visual representation of the lighting intensity in the rendered frame. It maps Illuminance and Luminance information as a color gradient or a grid of measured values onto values onto the frame. 

The Illuminance and Luminance channels are internally created during rendering. 

During the rendering, the Lighting Analysis might display some approximation to the false-color image, but that is not the final result. After the rendering is finished, every parameter change made in the Asset Editor updates the render result in the VFB.

Quantity – Chooses which lighting information to be analyzed.

Illuminance (lx) – Uses the Illuminance of the rendered frame in lux.
Luminance (cd) – Uses the Luminance of the rendered frame in candelas.

Minimum Value – Specifies which values are mapped to blue.  

Maximum Value – Specifies which values are mapped to red. 

Scale – Specifies how values are mapped to colors onto the frame. 

Linear – The colors are mapped in a linear scale. 
Logarithmic – The colors are mapped in a logarithmic scale.  

Display Mode – Specifies the analyzed data display mode. 

False colors –  Fills the frame with a gradient ranging from blue (low values) to red (high values). For the out of range values, it uses respectively black and white.
Grid overlay – Displays the values at distinct grid points over the frame. They use the same grading colors. 

Draw Legend – When enabled, shows a legend of the false colors at the bottom of the render. 

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