V-Ray Lens Effects simulates real-world camera lens effects such as bloom and glare. The plug-in uses a fast multi-threaded technique to compute the result and provide immediate update in V-Ray VFB. V-Ray Lens Effects are applied in the effectsResult channel together with other post effects executed over the RGB rendered image.
The Lens Effects fly-out is accessible from the Open lens effects settings button located in the V-Ray VFB Toolbar.