To test the path tracer I dug out one of my favoured interior files.
I found that I couldn't just enable the path tracer and everything is cool. The lighting was way too dark, so I almost doubled the sun's multiplier. All the reflective surfaces had to be reworked, and since PT doesn't support the glass shader yet, the cigarette smoke plane had to go, and all glass materials were replaced by solid ones.
Unfortunately the whiskey bottle now looks like a bottle of BBQ sauce, so Jack Daniels has to wait until PT accepts glass shaders.
Anyway, the GI and the shadows are much more accurate!!! I love it!
Btw: no postwork. Pure TG output.