I looked at IRAY with DAZ4.8... not free. The renderer is, but you buy all the texture stuff separately... ever added up all the 'add ons' that DAZ have available? Comes to 100's of dollars. Not free.

Oh, BTW, I use an AMD video card. IRAY is no advantage to me over Luxrender. Which IS free.

I think you are referring to vendor products as add ons, as there are no iray add ons. Of course they aren't free. Iray provides you with everything to do your own shaders and lights. Only thing DAZ sells with iray right now are lights. You can plug in your own HDR lights or create emission surfaces (and go to lighting manufacturers' websites to download EIS profiles) if you do not wish to pay. You can also pay around with the settings to convert old sets to look better without paying for anything. What you are paying for is the convenience of not doing it yourself. Also luxrender is free, though they are asking for donations to help keep their site running. Unless you are using the free script to export it from poser, you are paying for Reality, which makes it a bit easier to convert materials because you are paying for the convenience to do so.