Cache option disappears for Domain type-Flow #76968

New Issue

Vinayaka Shastri · 2020-05-22T12:21:00+02:00

Vinayaka Shastri commented

2020-05-22 12:21:00 +02:00

System Information
Operating system: Windows 10 Home
Graphics card: AMD Vega 8 & RX560X

Blender Version
Broken:2.82
(example: 2.79b release)
(example: 2.80, edbf15d3c044, blender2.8, 2018-11-28, as found on the splash screen)
Worked: (2.77)

Short description of error
When type-Domain(quick effect) cache option is present but when I change type-Flow the baking option disappears and the smoke does not appears while playing
Exact steps for others to reproduce the error
Create an object and add quick smoke and there is bake option in Cache menu.But change type from Domain to Flow cache menu disappears and while playing the animation smoke or fire does not appears!
Based on the default startup

**System Information** Operating system: Windows 10 Home Graphics card: AMD Vega 8 & RX560X **Blender Version** Broken:2.82 (example: 2.79b release) (example: 2.80, edbf15d3c044, blender2.8, 2018-11-28, as found on the splash screen) Worked: (2.77) **Short description of error** When type-Domain(quick effect) cache option is present but when I change type-Flow the baking option disappears and the smoke does not appears while playing **Exact steps for others to reproduce the error** Create an object and add quick smoke and there is bake option in Cache menu.But change type from Domain to Flow cache menu disappears and while playing the animation smoke or fire does not appears! Based on the default startup

Vinayaka Shastri commented

2020-05-22 12:21:00 +02:00

Added subscriber: @V3e

Alaska commented

2020-05-22 13:21:21 +02:00

Added subscriber: @Alaska

Alaska commented

2020-05-22 13:21:21 +02:00

Changed status from 'Needs Triage' to: 'Archived'

Alaska closed this issue

2020-05-22 13:21:21 +02:00

Alaska self-assigned this 2020-05-22 13:21:21 +02:00

Alaska commented

2020-05-22 13:21:21 +02:00

The reason why the cache menu isn't there when the type is set to "Flow" is because a cache can only be built for domains. Baking a cache for a "Flow" object is impossible without a domain object and in it's current implementation, Blender designed so you generate a cache for all objects in a domain rather than individual objects which would be the case if you could bake the cache for individual flow objects.

As for why your smoke simulation isn't working when you convert your domain to a flow object, that's because you no longer have a domain meaning no smoke simulations can occur.

As for why 2.77 had a cache option of flow objects, I would take a guess that it was probably a oversight. However, if baking the cache for individual objects in a domain was possible back then, it may not be possible now as the smoke and fluid simulation system drastically changed between 2.81 and 2.82. Hopefully the Blender manual can provide some useful information: https://docs.blender.org/manual/en/latest/physics/index.html

Note: Sometimes keyboard shortcuts and menu placements in the Blender manual may be incorrect. I am currently in the process of updating the manual to fix these kinds of issues. So if you find a issue with the manual, note it's probably there because I haven't worked on that part of the manual yet. Or, it requires the attention of someone with more knowledge in that area.

The reason why the cache menu isn't there when the type is set to "Flow" is because a cache can only be built for domains. Baking a cache for a "Flow" object is impossible without a domain object and in it's current implementation, Blender designed so you generate a cache for all objects in a domain rather than individual objects which would be the case if you could bake the cache for individual flow objects. As for why your smoke simulation isn't working when you convert your domain to a flow object, that's because you no longer have a domain meaning no smoke simulations can occur. As for why 2.77 had a cache option of flow objects, I would take a guess that it was probably a oversight. However, if baking the cache for individual objects in a domain was possible back then, it may not be possible now as the smoke and fluid simulation system drastically changed between 2.81 and 2.82. Hopefully the Blender manual can provide some useful information: https://docs.blender.org/manual/en/latest/physics/index.html Note: Sometimes keyboard shortcuts and menu placements in the Blender manual may be incorrect. I am currently in the process of updating the manual to fix these kinds of issues. So if you find a issue with the manual, note it's probably there because I haven't worked on that part of the manual yet. Or, it requires the attention of someone with more knowledge in that area.

Vinayaka Shastri commented

2020-05-22 15:15:57 +02:00

I tried domain + flow objects but still it didn't didnt show in animation!

Alaska commented

2020-05-23 04:31:16 +02:00

Are you able to provide a copy of your scene?

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Cache option disappears for Domain type-Flow #76968