"fake shadows" bug?

[divljikunic]

I've been having inconsistent results with architectural glass in Octane, and I've managed to pinpoint the problem.

This is a top down cutout of a "room" with a super-thick wall and a glass pane in the middle of the window opening in that thick wall. It clearly displays how light behaves after passing through glass. PT kernel, single color texture environment (it's the same in PMC).

The "fake shadows" option doesn't behave when using standard mesh lights, only with a skylight. I usually use a skylight, however using separate emissive planes has a lot of advantages, enables much finer control, avoiding burnt-out exteriors etc.
Glass rendering in general seems a bit odd in octane and I usually end up doing very strange tweaks and/or compositing and photoshop to make it "look good", instead of adhering to, you know, physics..

Any thoughts on this?

Jan

[bepeg4d]

Sorry, it's not completely clear for me
Does should be sky and emitter instead of portal and emitter?
Could you share a simple obj scene or better an orbx file?
ciao beppe

[divljikunic]

Sorry, it's not completely clear for me
Does should be sky and emitter instead of portal and emitter?
Could you share a simple obj scene or better an orbx file?
ciao beppe

No need for that, it happens in every scene. I'll try to illustrate better with a real-life example, just give me a couple of days to find the time to do it..

I'm talking specifically about interiors, product renderings are usually a trivial task for any GI, especially Octane's...