As a DAZ Studio user, I was wondering if there’s any difference between these two render engines. And is there a way to get Firefly for DAZ Studio?
The short answer is no, Firefly is the internal render engine for Poser. The only way to use Firefly is to use Poser.
But, Firefly and 3Delight both use the Reyes rendering algorithm. So, 3Delight and Firefly have the same roots, just different development paths. 3Delight is actually a more “powerful” render engine, just most of it is not easily accessible through the current DS interface. 3Delight has been used in several big films, so it is definitely capable of just about anything you might need, though some things like SSS are much easier in Poser.
What is it specifically that you want from Firefly that you aren’t getting from DS/3Delight? Someone here may be able to help you find the solution.
Edit: I forgot to add that Poser/Firefly in certain situations can be faster than DS/3Delight. But, Firefly does not support caustics, and some functions, like refraction, are not quite up to snuff in Firefly. Like anything in 3D, there seem to be pluses and minuses to all programs, but in the proper hands, they are all capable of outstanding results.