glas material problem

[zloner]

hiho

we do a lot of archviz and office interieur animations! since the new vray version i got the feelling that rendertimes raised up when there is a log of glass in the scene!

we have an actual animation with a lot of glass walls and first got the know problem with effect alpha and shadow but fixed this!

but as soon as there is glass in the room the rendertimes raise up to 3 hours on intel p4 3,2ghz... (lightcache and irridiance map prerendered)

if i take out the glass the frametime is about 20 mins...

does anyone have problems like this?

[joconnell]

Personally although it's incorrect, if glass is totally transparent I have a habit of turning off cast and receive GI and turning off cast shadows - especially for stuff like windows.

[jacksc02]

zloner, check the subdivs on the glass reflect/refract and also make sure that your rQMC sampler is at 1.5 defaults not 1.47 default