scattering fog doesn't render in animation

[jhjariwala]

Hello,

I am trying to render one scene using 3dsmax livelink. When I turn on scattering fog, it shows in vantage but when I render animation using livelink. Scattering fog doesn't appear in ti.

Is it not supported in animation? How do I render scattering fog in animation?

Regards,
Jignesh

[vladimir.nedev]

You have two options:
1. keep the live link running before you render the animation (if you stop it, the scene gets reloaded with default render settings)
2. specify the scattering fog parameters by creating a VRayEnvironmentFog atmosphere in the 3dsMax Environment dialog

Greetings,
Vladimir Nedev

[jhjariwala]

Yes, live link is running and still it doesn't render scattering fog. I also have scene saved as config. So everytime When I open fresh 3dsmax file and run live link, it gives default render settings and then in vantage I open my scene as config only (which was saved) and then I render sequence from 3dsmax vantage toolbar render sequence button.
But it still doesn't render scattering fog. I will try other method of using vrayenvironment fog.

[jhjariwala]

so with vrayEnvironmentFog added in 3dsmax effects, i am able to render scattering fog inside vantage. But after some frames vantage freezes and so 3dsmax. Shall I try recommended driver version or new nightly version?

[jhjariwala]

It could be driver issue. Installing 546.01 studio driver version as recommended by chaos solves the problem. So far scattering fog renders fine now in vantage.

EDIT : scattering fog render stuck again as you can see in an image.

[jhjariwala]

I will try new nightly version.

EDIT : still there is an issue in latest nightly build. I can't render scattering fog, it renders for some frames and then vantage freezes.

[vladimir.nedev]

Can you send us the scene that freezes ? Are you sure it's the VRayEnvironmentFog/Scattering Fog that causes the freeze ? Does it freeze without it ?

Greetings,
Vladimir Nedev

[jhjariwala]

Where can I upload the file? Can I email you wetransfer link? File size is big. There are lots of chaos cosmos assets (trees/grass) in it. And lots of maps.
It happens surely with vrayEnvironmentfog when added as effect in 3dsmax. It renders for some frames and then vantage freezes and doesn't continue.

Btw it all works nicely with stable version downloaded from download section of chaos my products page. So for now I am using stable version from chaos my products page for both vantage and vray update 1.

[jhjariwala]

I got this error while rendering with stable version of vantage and vray.

[vladimir.nedev]

Where can I upload the file? Can I email you wetransfer link? File size is big. There are lots of chaos cosmos assets (trees/grass) in it. And lots of maps.

Yes, a wetransfer link is fine.

Btw it all works nicely with stable version downloaded from download section of chaos my products page. So for now I am using stable version from chaos my products page for both vantage and vray update 1.

got this error while rendering with stable version of vantage and vray.

What were you using previously ? I guess the stable version and whatever you were using previously show the same issue ?

Greetings,
Vladimir Nedev

[jhjariwala]

When I use nightly version, vantage freezes and go into "Not responding" state for very long time. It happens after rendering some frames. And when I try to kill process of vantage in task manager, vantage UI gets closed but vantage.exe keeps running in taskmanager. I have no choice but to restart pc.
With stable version it renders fine but sometimes crashes after some frames rendered. but I don't need to restart pc and I can continue rendering again from last frame.

[jhjariwala]

I emailed you files at vladimir.nedev@chaos.com

[vladimir.nedev]

still there is an issue in latest nightly build. I can't render scattering fog, it renders for some frames and then vantage freezes.

I've notified nVidia about the issue, as it seems to be caused by a very rare case where the raytracing code becomes extremely slow and causes TDR ( Timeout detection and recovery ).
They will be able to answer after the holidays and I will write back here when I have more info.

The only possible work around for now is to disable the scattering fog.

Btw it all works nicely with stable version downloaded from download section of chaos my products page. So for now I am using stable version from chaos my products page for both vantage and vray update 1.

The reason it works with the Vantage 2.1 is because the slow down somehow happens when combining scatter fog and some of the mesh lights in the scene.
This combination wasn't working in Vantage 2.1

Greetings,
Vladimir Nedev