Hello,

I'm trying to follow Rohan Dalvi's particle tutorial using latest Houdini Apprentice, but having trouble with Motion Blur. (https://vimeo.com/95644892) [vimeo.com]


Rohan showed 3 things to check before getting Motion Blur rendered.

- sphere_object1, Sampling, Geometry Velocity Blur, ON
- Inside sphere_object1 there is trail1 to Compute Velocity
- ropnet1, mantra1, Sampling Allow Motion Blur, ON


I believe with those settings, I should get render result with Motion Blur, but no.


Here is my file: https://www.dropbox.com/s/7h5pp8cqnunfh2w/particle_test.hipnc [dropbox.com]


I would appreciate if anyone has time to check it, Thank you!

Moikka, ja tervetuloa

That's funny - everything seems to be in order. If I load your hip file, go to render tab and hit render I get a motion blurred image.

The motion blur is quite extreme, so you will need to increase the sampling quite a bit to get a good looking blur..

I checked your project , But every things works correctly and I had perfect motion blur !!!
I just open your project and press Render button , Then I take these results !

Oh , Sorry , I didn't see last reply !!!
Another thing is you don't need to use Trail SOP , because particle system generate Velocity vector automatically !
Just render your project with bypassing Trail SOP .
However we have another Motion Blur except Velocity Blur , Just you should open “Edit Parameter Interface” window for sphere_object1 , Then in the “For Rendering” page add Blur parameters to this node .(Use Filter to find them!)
Now you can see these new parameters in the Render->Sampling page for sphere_object1.
In the last step don't forget to set “Geo Time Samples” in the Mantra parameters to bigger number than 2.
Now you should have Motion blur again :wink:

Check attached file 8)

Thank you eetu and Joker386

It must be Houdini Apperence bug or something, at least on my machine

JuhaT
It must be Houdini Apperence bug or something, at least on my machine

So test other method in my last post , maybe it's work for you :?

Joker386

JuhaT
It must be Houdini Apperence bug or something, at least on my machine

So test other method in my last post , maybe it's work for you :?

Hello.

Sadly, same result without any motion blur.

Hey JuhaT

I faced the same problem. And i figure out that possibly you are doing the same mistake what i was doing.

While rendering please make sure you are using the /obj/ropnet1/mantra1

may be your using the default mantra node.
I hope it will help.

Thanks

Prashant Arora
Hey JuhaT

I faced the same problem. And i figure out that possibly you are doing the same mistake what i was doing.

While rendering please make sure you are using the /obj/ropnet1/mantra1

may be your using the default mantra node.
I hope it will help.

Thanks

Thank you Prashant Arora! You were right about this issue. Rendering /obj/ropnet1/mantra1 did the job and I got my motion blur.

Thank you