This page gives information on how to use the Chaos Cosmos Browser HDRI library in Revit.
Overview
Chaos Cosmos provides a vast library of ready to use Images divided in 3 categories - Day, Evening and Studio.
Usage
Open the Chaos Cosmos Browser HDRI library and download and import your assets.
On import, the environment light automatically changes to a Dome light, and the HDRI is assigned to it. You can see the preview of the HDRI in the V-Ray Lights window. For more information, refer to the V-Ray Dome Light page.
While it is recommended using the HDRIs applied to the Dome Light for image-based lighting, in some cases you might want to apply that image to the Background and combine it with V-Ray Sun. To easily copy the current Dome Light image to the Background Image slot, you can use the lock button 
found in the Background settings. After the image is copied, don't forget to switch the Light Type to V-Ray Sun.
