camera motion blur with particles problem

[highpoly]

I modeled this bottle and used pflow system with blobmesh. As you can see in the render below, no problem so far...

http://www.geocities.com/highpoly/BLOG/bottle-still.jpg

When I apply motion blur in the Vray camera section, and having both checked and unchecked 'treat particles as mesh', I still cant get the particles to blur when the bottle rotates quickly.

http://www.geocities.com/highpoly/BL...tle-rotate.jpg

this is kind of a strange situation in that the water particles themselves are not moving (they are locked on the emiiter ie the bottle) so particle mblur and object motion blur dont seem to be working either. If I were using the max renderer I would use motion object blur on everything, but why isnt the motion blur in vray blurring the blobmesh particles??

anyone??

[Morbid Angel]

well, vray used to have issues with particles but I think they were solved in RC versions, though Im not sure. What I can suggest is to use mesher object which will bake your particles into mesh, which then can be motion blurred properly, or collapse your blom mesh modifier to editable poly. Another thing I can think of is that blob mesh has a property of changing topology. Vray might print the warning in the vray window. Because of that it cant blur the mesh between frame 1-2. What you can do is reduce the blur amount (duration) from 1 to 0.5 or 0.9 anything below 1, this should also work.

[highpoly]

hey thanks...I tried the reducing duration to less than 1.0, but same thing...would i want blur particles as mesh on or off?? I will try collapsing blob mesh and see if that works...

Dont know if its related but when i try to network render this scene, i get a VRAYSKY6.0 dlt missing error, even though I am not using sky and the plugin in clearly there on the server machine...very weird...i do have environment ON and using a color but thats it....

I will let you know how the collapse blobmesh goes..thanks

[highpoly]

not having much luck..collapsing the blobmesh into poly just make the drops into the rough blobmesh proxy objects (not the rendered ones). I am getting that error you mentioned in the vray window about changing topology...
not sure what I am doing wrong....

[highpoly]

well, scratch that comment about the vray sky 6.0dlt..
the server machine didnt have the right path for vray plugins in the plugin.ini

so, now i just need these blobmeshies blurred am I am off to renderland..anyone else? any ideas?

thanks

[jacksc02]

highpoly, it sounds like you have a machine that doesnt have the same build on it. Double check all nodes are running the same version

[highpoly]

hey thanks...I just checked and now everything is cool netrender wise..

just the damn particle blurring problem still. Not sure why the mesher didnt work..i tried picking the blobmesh as the object and then separately the pflow events (havent really used mesher before)...neither worked..

: (

[LarsSonparsson]

Are you working with 64-bit V-ray?
If yes, it's already known bug with pflow and mblur.
It's already fixed for the next release. That's what I heard.


-LarsSon

[vlado]

This is a known issue in 64-bit V-Ray; it is already corrected; if you need an update, please email me to vlado@chaosgroup.com

Best regards,
Vlado

[highpoly]

i wish that were it! I am using the 32 bit version with max 8...

can you tell me what the procedure SHOULD be anyway for this kind of thing? using pflow w/ blobmesh and particle emiiter is moving (not particles themselves) and would like motion blur on the blobmesh (waterdrops) as I am getting with the other geometry (bottle) using Vray Camera motion blur...

thanks!

[vlado]

Oh, it's the blobmesh; then I'm afraid this is not going to work, since the blob mesh really does change its number of triangles in between frames. The most reliable way to get this done is to use Multipass motion blur. Image motion blur might work as well, depending on the specific way the mesh moves.

Best regards,
Vlado

[highpoly]

Thanks for your reply! Really? even though the blob mesh is not deforming or animating (just still droplets)? i didnt see how i could use image or objetct motion blur since the max controls for those are not there (vray is current renderer)...

Multipass (sigh) that takes sooooo long. Darn! Wish there was an easy way to just make these blob mesh drops into a mesh that is as smooth at the blobmesh at render time (collapsing the blobmesh to polys just gives me blobmesh preview mesh) ie nasty tetras, etc....

[bluescreen2]

collapse 2 poly + a relax modifier doesnt work?

[highpoly]

hmm...didnt try the relax modifer...will give that a shot. thanks!

[vlado]

Thanks for your reply! Really? even though the blob mesh is not deforming or animating (just still droplets)?

In that case can you not just collapse it to an editable mesh and possibly do a turbosmooth on it? I think you can also control the quality of the blob preview mesh.

i didnt see how i could use image or objetct motion blur since the max controls for those are not there (vray is current renderer)...

You can use the "Motion blur" render effect.

Best regards,
Vlado