Comment: I guess I'm an iRay convert
Caveat: I've spent MANY years out of DAZ Studio. My last major version was 3.1; so what I think of as "new" is probably standard stuff for a lot of you here.
I have to admit as a long time fan of the 3Delight rendering engine (I used to vehemently defend it against the Poser fanatics), I was skeptical of iRay. I felt like I was giving up a lot of the control I had over lights and surfaces and relying on the engine to get things right. While I'm still struggling with some of the nuances (my indoor scenes seem to be too dark while outdoor scenes all look like they're shot at high noon in the desert), the wealth of shader options and the fact that my in-scene light bulbs case light, as well as the excellent skin controls have won me over to using iRay exclusively now.
I will using the studying I had done about Renderman based engines like 3Delight, but I am definitely happy with the images I'm getting out of the "new" engine.
Comments
Cool! 3Delight will always be there if you need to do something like turning off shadows for an object. You might even consider using both and compositing elements of each together to get a finished picture. Always good to have options!
at a first glance, 3delight seems a good alternative to iray
following a quick comparison, same render time, different resolution