Clean noisy motion blur

[Correntes]

Hi guys,

I have one exterior scene that have rain with motion blur.
Its a house surrounded by trees.

Whats the best way to tackle the motion blur ?
Corona seems to struggle to clean up the rain drops.

Thanks

[TomG]

You could lower Gi vs. AA balance, as that can help shift processing power onto DOF and MoBlur (see https://coronarenderer.freshdesk.com/support/solutions/articles/5000526159-what-is-gi-vs-aa-balance- ). Is it just that it is taking a while to clean up, not that the effect is too strong (in which case, adjusting the camera values could help). Another thought I have (not tested this, so it is just a thought!) is that raindrops closer to the camera will show more motion blur, so perhaps limiting how close they are to the camera could help by avoiding ones that have excessive motion blur.

Last, there is also the option to use the CGeometry_Velocity and add the moblur in post (e.g. using the free Fusion, or commercial plugins for After Effects like RSMB), while this can be less realistic, it can certainly be faster, and may be just fine for something like raindrops. See

[Correntes]

Thankd.

Dont know if i should lower the gi vs aa.
I also have a large interior area quite visible.

Already limited the closest to camera rain drops.

Gonna play a little bit with the values to see if i can find a balance.

[pokoy]

Sampling small objects for motion blur can be difficult indeed. If you can, you could separate them from the main scene to make sure they get all the samples and comp later, but this really only works in certain situations.