Web distribution is based on a geometric mesh that models the intensity distribution pattern of a light source.
Create panel > (Lights) > Photometric Lights > Click Target Light or Free Light. > General Parameters rollout > Light Distribution (Type) group > Choose Photometric Web from the drop-down list.
Topics in this section
Photometric Webs
A photometric web is a 3D representation of the light intensity distribution of a light source. This directional light distribution information is stored in a photometric data file in the IES format using the IES LM-63-1991 standard file format, or in the LTLI or CIBSE formats for photometric data. You can load photometric data files provided by various manufacturers as web parameters. In viewports, the light object changes to the shape of the photometric web you choose.
IES Standard File Format
You can create a photometric data file in the IES format using the IES LM-63-1991 standard file format for photometric data. (IES stands for Illuminating Engineering Society.)