Weird artifact in fire volume

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womble
Licensed Customer
Posts: 33
Joined: Mon May 24, 2010 3:05 pm

Hi,

I'm exporting from Blender a fire volume in Open VDB format. When imported into Octane 3.0 standalone I get some weird blocks which I can't find out how to get rid of. See image below...

Image

Anyone got any ideas on whats going on?

Many Thanks
Andy
SW: Octane 1.54 | Win 10 64bit | Blender 2.78 HW: GTX 580 1.5GB | GTX 780Ti | i5 2500K (OC @ 4100mhz) | 8GB RAM | Asus P8Z68-V LX Drivers: 306.97
pegot
Licensed Customer
Posts: 934
Joined: Mon Nov 07, 2011 3:44 am

Just a guess - but are the various Blender resolution settings for the smoke domain high enough? The defaults export to octane somewhat blotchy (maybe they work better natively in Cycles).

FYI - I am very new to using VDB for smoke & fire sims but in my testing it seemed as if a default Houdini VDB export came into Octane with much better resolution than the Blender ones.
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womble
Licensed Customer
Posts: 33
Joined: Mon May 24, 2010 3:05 pm

hi pegot,

I scaled up the domain and flow meshes - that seems to have fixed it. I know what you mean about blotchy but the more I play around the better the results I'm seeing. I'll post something up here when I've got to grips with it more.
SW: Octane 1.54 | Win 10 64bit | Blender 2.78 HW: GTX 580 1.5GB | GTX 780Ti | i5 2500K (OC @ 4100mhz) | 8GB RAM | Asus P8Z68-V LX Drivers: 306.97
aggiechase37
Licensed Customer
Posts: 214
Joined: Tue Jan 13, 2015 6:39 am

Don't know about your program, but in x-particles, if you ramp up the particles per voxel, this problem goes away.
Chase

Win 10 - Intel 4770 - 2x Nvidia 1070 - 32 gigs RAM - C4D r16

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