Little white dots

Spydraxis (Todd Grosser)

My renders now have hoards of white dots...no lights and they don't appear on all surfaces...in fact some surfaces don't render at all even though they're enabled to be visible in render.  I'm at a loss because this just started after I accidentally selected an IRay lighting set which switched my render engine to IRay and I switched back.  

Spydraxis (Todd Grosser)

It appears the problem is specifically within this saved scene...as I am not getting the same result with other scenes.

BeeMKay

You said you loaded a lighting set... have you checked if the light set loaded any lights that you didn't remove? Or did it just load a HDRI?