Smoke Flow force field inconsistency #75976

New Issue

Everton Schneider · 2020-04-21T20:20:52+02:00

Everton Schneider commented

2020-04-21 20:20:52 +02:00

System Information
Operating system: Linux-5.3.0-46-generic-x86_64-with-debian-buster-sid 64 Bits
Graphics card: GeForce GTX 980 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.82

Blender Version
Broken: version: 2.83 (sub 13), branch: master, commit date: 2020-04-20 16:50, hash: be7c51d076
Worked: Not sure

Short description of error
When using the smoke flow force field to advect particles I discovered a strange behavior. The results vary between the two cases:
1 - While baking the smoke sim with replay cache mode the smoke flow force field seems to work ok(but I still find something strange... it's hard to set up and make it work well but this is another thing separated from the problem from this report...)

2 - After the smoke sim is cached and you change some of the settings from the smoke flow force field the inconsistency is apparent, the particles become totally different and even when you set the values back to where they are before the result from case 1 never came back... you need to clear the smoke cache and simulate again...

FEATURE REQUEST-
Is it possible to expose and decouple specific and different values from the smoke simulation to be used in the smoke flow force field? Now we have only(and very welcome) the density option... this is an example:

Exact steps for others to reproduce the error

open the attached file;
start the playback and see the "right result" of particles motion advected by the smoke through the smoke flow force field;
after the smoke sim is cached try to change any value from the smoke flow force field like strength... the result is not anymore related to the smoke... and even bring the value back the result is different...

SmokeFlow_Inconsistency.blend

**System Information** Operating system: Linux-5.3.0-46-generic-x86_64-with-debian-buster-sid 64 Bits Graphics card: GeForce GTX 980 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.82 **Blender Version** Broken: version: 2.83 (sub 13), branch: master, commit date: 2020-04-20 16:50, hash: `be7c51d076` Worked: Not sure **Short description of error** When using the smoke flow force field to advect particles I discovered a strange behavior. The results vary between the two cases: 1 - While baking the smoke sim with replay cache mode the smoke flow force field seems to work ok(but I still find something strange... it's hard to set up and make it work well but this is another thing separated from the problem from this report...) ![Screenshot from 2020-04-21 15-06-37.png](https://archive.blender.org/developer/F8487780/Screenshot_from_2020-04-21_15-06-37.png) 2 - After the smoke sim is cached and you change some of the settings from the smoke flow force field the inconsistency is apparent, the particles become totally different and even when you set the values back to where they are before the result from case 1 never came back... you need to clear the smoke cache and simulate again... ![Screenshot from 2020-04-21 15-06-19.png](https://archive.blender.org/developer/F8487782/Screenshot_from_2020-04-21_15-06-19.png) - FEATURE REQUEST- Is it possible to expose and decouple specific and different values from the smoke simulation to be used in the smoke flow force field? Now we have only(and very welcome) the density option... this is an example: ![Screenshot from 2020-04-21 15-19-50.png](https://archive.blender.org/developer/F8487802/Screenshot_from_2020-04-21_15-19-50.png) **Exact steps for others to reproduce the error** - open the attached file; - start the playback and see the "right result" of particles motion advected by the smoke through the smoke flow force field; - after the smoke sim is cached try to change any value from the smoke flow force field like strength... the result is not anymore related to the smoke... and even bring the value back the result is different... [SmokeFlow_Inconsistency.blend](https://archive.blender.org/developer/F8487772/SmokeFlow_Inconsistency.blend)

Everton Schneider commented

2020-04-21 20:20:52 +02:00

Added subscriber: @EvertonSchneider

Everton Schneider commented

2020-04-21 20:25:43 +02:00

About the feature request... I know that this is not the place... but where can I suggest this new feature?

Brecht Van Lommel commented

2020-04-22 10:27:09 +02:00

Added subscriber: @brecht

Brecht Van Lommel commented

2020-04-22 10:27:09 +02:00

See:
https://wiki.blender.org/wiki/Communication/Contact#User_Feedback_and_Requests

See: https://wiki.blender.org/wiki/Communication/Contact#User_Feedback_and_Requests

Everton Schneider commented

2020-04-22 16:35:18 +02:00

Thanks @brecht I was able to reach the right channel to discuss about this idea.
https://devtalk.blender.org/t/update-smoke-flow-force-field/12761/2

But what about the strange behavior in the smoke flow force field after the smoke sim bake? Do you think it's fixable for now?

Thanks @brecht I was able to reach the right channel to discuss about this idea. https://devtalk.blender.org/t/update-smoke-flow-force-field/12761/2 But what about the strange behavior in the smoke flow force field after the smoke sim bake? Do you think it's fixable for now?

Richard Antalik commented

2020-04-22 16:44:23 +02:00

Closed as duplicate of #74060

Richard Antalik closed this issue

2020-04-22 16:44:23 +02:00

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Smoke Flow force field inconsistency #75976