Corona Renderer for 3ds Max > [Max] Bug Reporting

Corona VDB 7 vs 6

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olivierc:
Dear Rowan,

Thank you for your reply.

smoke on the left is 100% and smoke on the right is 1,4%



The max scene is attached.

Best,
Olivier

v.p.vlasenko:
Hi people,

seems like vdb is broken more than I thought or even volumes at all.

empty scene, scale in meters, sun size 5 (with default size same thing), default environment and "wdas_cloud_quarter" - step 1m

First of all, even with a 100% scale it does not work as expected
first attachment - 100%, we can see the sun through volume and I checked it with phoenixfd - similar result, so that not only coronavdb problem.
second - 5% scale.
third one - 5% scale, but step 0.2m.
fourth - 5%, step 5m.

Decreasing step size doing things even worse

I tried different absorption, scattering constant/density with different multiplier - all wrong.
So definitely something broken.

Btw it seems like phoenixfd producing correct? results at all scales - but in all cases we can see the sun through cloud.

olivierc:
Hello,

Thank you. Yes I experience the same problem. Clouds have a strange "cut out" effect in its volume.

In Corona 6, scale was definitely not an issue.

Best,
Olivier

rowmanns:
Hi,

Thanks for the scenes, we have managed to reproduce this here.

We will let you know when there is some more information.

Thanks,

Rowan

(Report ID=CRMAX-968)

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