First Interior - Lithium Design

[CTZn]

Since when are exit portals working with anything exept sunsky? Did I miss something?

exit portals are not doing well with single path tracing and sun, though one of the two PT mode may work better than the other (w/o GPU). Bidir and MLT should use them fine.

[Zom-B]

...though one of the two PT mode may work better than the other

Just to iron that out:
the restriction here is only for pure PT (as used in GPU mode too)!
BiDir PT works fine, same as MLT and BiDir MLT.