OpenVDB- Smoke disappeares #63630

New Issue

Korbinian Weber · 2019-04-15T21:23:28+02:00

Korbinian Weber commented

2019-04-15 21:23:28 +02:00

System Information
Operating system: Windows 10 1803
Graphics card: Radeon VII

Blender Version
Broken: 2.80 Beta 860a9f979d

Short description of error
When baking smoke using OpenVDB keyframing the smoke-density doesn't work. The smoke won't appear at all.
I don't know if that is due to limitations in the VDB-Format or if it is an actual bug. But the smoke still shows up when playing the animation frame for frame without baking.

Exact steps for others to reproduce the error
Add Smoke Domain
Set Cache to OpenVDB
Add a Smoke-Flow-Object
Keyframe the density-parameter of the Smoke-Flow, e.g. frame1: 100%, frame10: 0%
Bake

**System Information** Operating system: Windows 10 1803 Graphics card: Radeon VII **Blender Version** Broken: 2.80 Beta 860a9f979d60 **Short description of error** When baking smoke using OpenVDB keyframing the smoke-density doesn't work. The smoke won't appear at all. I don't know if that is due to limitations in the VDB-Format or if it is an actual bug. But the smoke still shows up when playing the animation frame for frame without baking. **Exact steps for others to reproduce the error** Add Smoke Domain Set Cache to OpenVDB Add a Smoke-Flow-Object Keyframe the density-parameter of the Smoke-Flow, e.g. frame1: 100%, frame10: 0% Bake

Korbinian Weber commented

2019-04-15 21:23:28 +02:00

Added subscriber: @WhitecloudFX

Korbinian Weber commented

2019-04-15 21:47:00 +02:00

After further investigation it turned out that in fact an OpenVDB-cache can't handle different types of smoke color.

Sebastian Parborg commented

2019-04-16 12:17:39 +02:00

Added subscriber: @ZedDB

Sebastian Parborg commented

2019-04-16 12:17:39 +02:00

So this can be closed then?

Korbinian Weber commented

2019-04-16 12:36:07 +02:00

No, unless it is impossible for VDB to handle different smoke colours. To recreate the issue:
Add Smoke Domain
Add two different Smoke-Flow-Objects
Set different Smoke Colors for the objects
Set Cache Type to OpenVDB
Bake

No, unless it is impossible for VDB to handle different smoke colours. To recreate the issue: Add Smoke Domain Add two different Smoke-Flow-Objects Set different Smoke Colors for the objects Set Cache Type to OpenVDB Bake

Sebastian Parborg commented

2019-04-16 13:02:49 +02:00

Added subscriber: @brecht

Sebastian Parborg commented

2019-04-16 13:02:49 +02:00

@brecht should we do anything about this before we replace the smoke system?

Sebastián Barschkis commented

2020-01-21 21:13:29 +01:00

Added subscriber: @sebbas

Sebastián Barschkis commented

2020-01-21 21:13:29 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Sebastián Barschkis closed this issue

2020-01-21 21:13:29 +01:00

Sebastián Barschkis self-assigned this 2020-01-21 21:13:29 +01:00

Sebastián Barschkis commented

2020-01-21 21:13:29 +01:00

Closing this as Mantaflow was merged into master and the old smoke system is no longer supported.

The current OpenVDB smoke cache is based on different code too (i.e. not within Pointcache anymore).

Closing this as Mantaflow was merged into master and the old smoke system is no longer supported. The current OpenVDB smoke cache is based on different code too (i.e. not within Pointcache anymore).

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OpenVDB- Smoke disappeares #63630