Ailig68 opened this issue on May 25, 2008 · 17 posts
Rutra posted Mon, 26 May 2008 at 1:00 AM
If you only want the material to seem iluminated (and not really cast light), luminosity is the way to go, IMO. From my personal experience, I found that area lights are slower to render and introduce noise. Of course, if you really want the billboard to cast light to visibly influence other elements in the scene, then you should use area light.