This set includes an amazing 90 different HDR based lighting presets for Iray! There are 45 separate Direct maps that are great for one click lighting solutions and specular effects. These come along side 45 Soft maps which merge well with your own light setups and are perfect for AO renders. Also included are a suite of Utility presets to help you rotate and brighten lighting effects as well as enable/disable Dome visibility.
All of the maps contained in this particular expansion come in at double the resolution and make use of detailed direct light source shapes. This increased resolution will help when using the HDRIs as gradiated backgrounds, and the new light source shapes help a great deal to create interesting specular reflections!