https://i.ytimg.com/vi/tuJmH5aeHaA/hqdefault.jpg In latest Version of Arnold 2.0 for Maya Release Date April 12, 2017 U can create Light group without using any 3rd Party shader such as Alshaders You want more control over the lights. Wanna create separate light passes then Light Group Aov is the only option Thank you for watching: http://www.pamulighter.com/blog.html source