# VrayVolumeGrid not appearing in viewport and not rendering

**URL:** <https://forums.chaos.com/t/vrayvolumegrid-not-appearing-in-viewport-and-not-rendering/87477>\
**Category:** Issues\
**Created:** [March 11, 2018, 12:25pm UTC](https://forums.chaos.com/t/vrayvolumegrid-not-appearing-in-viewport-and-not-rendering/87477 "2018-03-11T12:25:23Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![gagui](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/gagui/32/33244_2.png) [@gagui](https://forums.chaos.com/u/gagui)\
**Post date:** [March 11, 2018, 12:25pm UTC](https://forums.chaos.com/t/vrayvolumegrid-not-appearing-in-viewport-and-not-rendering/87477/1 "2018-03-11T12:25:23Z")

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Hello!

I’m having a problem trying to render a Vrayvolumegrid with a phoenix fd sim loaded in, the sim is not appearing in the viewport and not rendering.  
I have 3dsmax 2018.4 and vray 3.60.04

Another problem I’m getting is when I try to render the phoenix fd sim directly it renders fine and saves to exr fine but if I check “deep” in the exr options then renders fine but the saved exr has no simulation rendered.  
I need to render a phoenix fd sim in deep mode and thats the reason I’ve tried the Vrayvolumegrid approach but none of both seem to work.  
What could be the problem?

Thanks!

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**Author:** ![Svetlin.Nikolov](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/svetlin.nikolov/32/64983_2.png) [@Svetlin.Nikolov](https://forums.chaos.com/u/Svetlin.Nikolov)\
**Post date:** [March 12, 2018, 10:01am UTC](https://forums.chaos.com/t/vrayvolumegrid-not-appearing-in-viewport-and-not-rendering/87477/2 "2018-03-12T10:01:34Z")

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Hey,

For the first question - if you are loading an AUR cache into the volume grid, the solution will be to get a latest stable nightly of V-Ray 3.6 - here’s the Phoenix changelog for more info on why: [Chaos Docs](https://docs.chaosgroup.com/display/PHX3MAX/3.10.00)

For the second question - try Volumetric Geometry mode - you need this anytime when it comes to render elements.

Cheers!

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**Author:** ![gagui](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/gagui/32/33244_2.png) [@gagui](https://forums.chaos.com/u/gagui)\
**Post date:** [March 12, 2018, 12:29pm UTC](https://forums.chaos.com/t/vrayvolumegrid-not-appearing-in-viewport-and-not-rendering/87477/3 "2018-03-12T12:29:31Z")

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I’ve asked for access to the nightlies through email support but I’m still waiting.  
In the meanwhile I managed to render what I needed resimulalting to vdb and using volumetric geometry as you mention.

Thanks Svetlin.