VRayProxy + Motionblur

[screen-id]

Hi,

we have a problem using VRayProxies with animation and Motionblur.
There are two sphere's: one animated mesh (red sphere) and one VRayProxy (blue one) generated from the sphere. Both are animated with the same speed. The red one is much more blurred as the blue one. Any ideas what's wrong?

Best regards
Thomas

[Jens_3deutig]

hi thomas,

how did u animated the sphere? over transform or vertex deformation?

[screen-id]

Hi Jens,

they are with transform animated. The VRayProxy is an animated one.
Both sphere's just move from right to left side.

Is there a difference when using vertex deformation?

[vlado]

Can you explain a bit more how to recreate this? I tried on a simple scene, but it worked fine, so there may be something else that I missed.

Best regards,
Vlado

[Jens_3deutig]

did u use an "animated vray proxy" with the animation inside the proxy ? or did u animate a proxy over tranform?

cheers,
Jens

[screen-id]

Hi,

I create a sphere and animate it using the transform animation (press the animate botton an move the sphere in x-direction).
After I clone the sphere as a reference and convert it to an animated VRayProxy with the Vray mesh export.
Then creating a Vray Physical Camera with Motionblur and render the two objects. You will see that the Mesh-Sphere is more blurred (it look's faster) as the VRayProxy. Even if you try to speed up the VRayProxy using the speed slider in the MeshProxy Params Menu - there is no influence on the Motionblur effect.

You will find an zip-file with the max file and the VrayProxy on our webserver http://www.screen-id.com/motionblur.zip

[vlado]

Thanks for the scene; the issue is because with the chosen settings for the physical camera, you get motion blur for more than 1 frame and the VRayProxy cannot motion blur deformations for more than one frame currently. Your shutter speed is 1/10=0.1s whereas one frame duration is 1/30=0.033s. So the proxy is motion-blurred for one frame at most whereas the regular sphere is motion-blurred for several frames. It will work fine if the proxy transformation itself is animated, rather than the contents of the proxy. It will also be fine if the motion blur is one frame or less.

Best regards,
Vlado

[screen-id]

okay - thank you for this information.

Best regards
Thomas

[Bowen Studios]

I'm having the same problem, any chance this will be added later?

VRayProxy cannot motion blur deformations for more than one frame currently

[vlado]

We could look into it, but I can't say when we'll get to it.

Best regards,
Vlado