Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => [Max] Resolved Bugs => Topic started by: cecofuli on 2018-06-28, 15:19:03

Title: CVolumeGrid: possible bug with Velocity channel?
Post by: cecofuli on 2018-06-28, 15:19:03

Hello:

(*) Create an explosion with PhoenixFD with Velocity Output ON (by default is OFF).
(*) Export the simulation as .vdb format.
(*) Import the .vdb files in 3ds Max with CVolumeGrid.
(*) Set Speed multiplier= 0.5.
(*) Set Mode=Velocity based.
(*) Set Velocity=Velocity.
(*) Multiplier = as you want.
(*) Turn on Mblur  (Geometry) in the CoronaCamera.
(*) Render the animation (it's enought a few frame)

The interpolated frames (frame 1, frame 3, frame 5 etc...) are really weird.
If you use Mode=Simple, everything is ok

Is it a bug?

Title: Re: CVolumeGrid: possible bug with Velocity channel?
Post by: maru on 2018-06-28, 17:38:31

Further note from Francesco:

Quote

Also, if you look at my .mov file, try to see the frame 01. When the Mode: Simple, the interpolation isn't so good. There is a "violet" halo around the explosion. This "halo" doesn't exist in the frame 0 and in the frame 2.

Title: Re: CVolumeGrid: possible bug with Velocity channel?
Post by: maru on 2018-07-06, 11:01:35

Confirmed. We are looking into this...

Title: Re: CVolumeGrid: possible bug with Velocity channel?
Post by: maru on 2019-01-08, 14:05:58

The fix is available in the newest daily build (https://coronarenderer.freshdesk.com/support/solutions/articles/5000570015) and will be also a part of Corona Renderer 4.