Image Based Light can be used to render with natural light, but also to light any other scene that must not necessarily be photo-realistic - and they give nice backdrops, too.

All Daz 3D programs accept the same type of HDRI. The three HDRI's included are in in three sizes and can be loaded directly into any of the Daz programs. Starter documents for all are included to help you get going, including shadow capture for Carrara and Bryce (Studio Iray has one already). There is an outdoor, an indoor and an abstract HDRI to create great artwork in your favourite 3D program.