Pret-a-3D opened this issue on May 14, 2012 · 8453 posts
JtheNinja posted Sun, 20 January 2013 at 1:27 PM
Quote - > Quote - Is that all my sci fi renders are taking 6 to 8 each but I think thats due to all the panels coverted to light...
That does account for speed loss, also the fact they do not generate much light, so Luxrender must take many, many samples to 'enlight' your scene.
I don't know if any of this is exposed in Reality yet, but there is a way to tell Lux not to trace light paths or shadow-ray tests on a lamp: http://www.luxrender.net/forum/viewtopic.php?f=8&t=7480&start=70#p81984