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3ds max + vray camera motion blur
show user profile  suhanibhatt1968
hi, i am using vray 3 and max 2014, i know that i can create velocity pass to create motion blur for moving or rotating objects in my animation.

but in my scenario, my objects are static, my camera is moving, how can i get motion blur pass without sacrificing render times by turning on motion blurr in camera itself.

please advice.

read 516 times
5/9/2017 5:19:18 PM (last edit: 5/9/2017 5:19:18 PM)
show user profile  9krausec
What are you comping in?

TBH, I've never got post MB to work correctly with velocity passes in AE using RSMB. I haven't tried for a while, but now I either just do it in camera (slow) or use RSMB Pro w/o velocity pass.

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read 510 times
5/9/2017 6:47:45 PM (last edit: 5/9/2017 6:47:45 PM)
show user profile  ScotlandDave
Haha, that's an interesting problem don't think i've ever tested that.. So the motion-vectors don't count if the objects are stationary but the camera is moving? In that case i'd do what 9k says and use RSMB Pro ( non vector version ) do it, it does an ok job..

Btw 9k - The reason your vectors aren't working is quite possibly this.. If you output as EXR or similar format, in AE you have to precomp your exr layer. RSMB won't read the rgb vector info even if your footage has the EXTractor effect set to output the Motion pass - you have to comp it. I had to figure this out the long and hard way.. Only other potential reason could be aftereffects interpeting your vector pass as linear - similar to what i said with depth passes recently you don't want to gamma correct those as they are not relative to color-space. There's a 'preserve rgb' option i think in the Interpret Footage box for that..

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read 499 times
5/10/2017 12:42:02 AM (last edit: 5/10/2017 12:42:02 AM)
show user profile  suhanibhatt1968
yes i am using AE, so there is no other way to get motion blur in camera other than to either use in camera itself (very slow) or use RSMB
am i right ?
read 490 times
5/10/2017 5:46:06 AM (last edit: 5/10/2017 5:46:06 AM)
show user profile  ScotlandDave
According to the Vray docs:

VrayVelocity Pass

The VRayVelocity render element renders velocity based on objects axis movement. Which is not helpful..

Vray G-Buffer Support

But the G-Buffer Supports 3dsMax Velocity which is apparently 'relative to camera' - which might help. You'll have to test..

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read 469 times
5/10/2017 2:23:58 PM (last edit: 5/10/2017 2:25:03 PM)
show user profile  9krausec
Awesome Dave. Thanks for the pointer. I do render out in a multi-channel 32bit EXR so that very well might be the issue.

I know I've had the same thing happen with ZDepth and learned that it needed to be precomped. Can't remember last time I tried velocity pass though.


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read 465 times
5/10/2017 3:46:42 PM (last edit: 5/10/2017 3:46:42 PM)
show user profile  suhanibhatt1968
how do i create G-buffer pass in vray + 3ds max 2014 am bit confused, how is it going to help me to get motion blur on moving camera just like the question i raised in my first post. please help.
read 434 times
5/12/2017 6:32:49 PM (last edit: 5/12/2017 6:32:49 PM)
show user profile  ScotlandDave
I would suggest either rtfm or

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read 418 times
5/13/2017 1:10:06 PM (last edit: 5/13/2017 1:10:06 PM)
show user profile  FX
The first rule about the Vray G-Buffer club is you don't talk about the Vray G-Buffer Club.
read 415 times
5/13/2017 1:16:06 PM (last edit: 5/13/2017 1:16:06 PM)
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