well we’ve had combustion in the office for almost a year and im just now getting around to learning it. 
i was testing out a targa sequence of the shack scene i posted awhile back i came across the motion blur operator. it seems to be a good way to reduce flickering.
http://www.joepizzini.com/VRAY/Shack/shackmovie.htm
(it may take a sec for the bottom clip to load)
the top clip has the motion blur and the bottom does not. and as you can see theres some significant flickering going on on the bottom.
just thought i’d share the result.
-joe
Looking Good! Thanks for the info.
Ill definately give it a try here. I am just now learning it also.
it looks good with the motion blur, but i think its a little strong in reality the camera or object would have to be moving fairly quickly to produce that ammount of blur. It would be an interesting test to try a night scene with the physical camera with motion blur enabled to see how much blur is produced in a “realistic” way
Just my 2 cents worth 
i agree. its not entirely realistic. i tried the physical cam with m blur enabled and as you said the cam just isn’t going fast enough to see any noticeable changes.
one thing i wanted to ask about is it seems that the physical cam is much slower than the std. max cam in general. i disabled the motion blur on the physical cam for this comparison. All settings are default except for the low f-number.
would everyone else agree that it is slower in general. i’ve noticed this in other test scenes and am not sure if it is setup that is causing slowness. i know i’m supposed to use the vray sun and sky along with the physical cam but even in those test scenes renders seem to take longer as opposed to a similar scene without the vray sun/sky/camera
thanks
-joe
physical cam:
max cam:
do you have depth of field enabled?
The physical camera has its own options for DOF and moblur, make sure those are not enabled by mistake when doing the comparison.
Best regards,
Vlado
sorry for the delayed response.
the physical cam has motion blur and DOF disabled. all of its settings are default except that i changed the f-number to 2.
i then realized the the time gap could be due to my IR map mode which was set to incremental add to current. so i did this test using single frame IR calculation.
the top is the standard cam and bottom is physical cam. Still a gap in rendertime but not nearly as big.
thanks
-joe