Searching the web for some HDRIs I found this FREE rendering system:
Kerkythea rendering system
unlike other rendering systems it has a graphic user interface, where it's very easy to set cameras, lights and materials, Global Ilumination, radiosity and IBL (pictures and HDRIs, it was very easy for me to import a Daz Studio scene exported in OBJ format and render it with great lighs and caustic, I really like it, I'll go on testing it.
In case you need it for your renders here you'll find some good HDRIs and probes for your Carrara Vue or Poser renders:
Unparent
Happy renderings