Who uses 3delight? There’s plenty of content that uses Iray only, so I’ll stick with that. Everything for Daz is Iray, but not everything for Daz is 3delight. Not sure about Blender, Poser and other programs though. Safe bet for me is Nvidia and Iray. If I want to animate, I’ll get Iclone, or create; substance painter. Both programs use Iray to speed up rendering, and make it look more realistic. But I think that’s a little too advanced for what the guy is looking for.
Most recently released Daz products support Iray, but a number of the older products do not. Most of the time you can just apply the Iray Uber Base shader to such older products, but other times you need to to a bit more work to make them look good in Iray. With older products, that's to be expected, of course.
I was just pointing out that some people DO go the 3Delight route instead, because they prefer it over Iray. Nothing wrong with either, it's personal preference, but Iray is more popular at the moment of course. There are several threads on the Daz3D forum where the 3Delight folks do their thing and help each other out.
I'm on the Iray path of course, but I respect those that decide to go the 3Delight route. Among other things, the renders will have different qualities that differentiate themselves from Iray, so for folks looking for a 'different' look, it might be a thought. You can do a LOT with Iray as well, of course as far as changing the 'look'.
This discussion REALLY should be in the Programming and Development section, though, not in this fanart thread.