Mantaflow smoke simulation render looks different in 2.82 and 2.83 #78290

New Issue

jagsir Khokhar · 2020-06-26T05:45:06+02:00

jagsir Khokhar commented

2020-06-26 05:45:06 +02:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce 940MX/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 446.14

Blender Version
Broken: version: 2.83.1, branch: master, commit date: 2020-06-25 09:47, hash: 8289fc688b

Short description of error
Mantaflow smoke simulation looks different in 2.82 and 2.83

Exact steps for others to reproduce the error
In Blender 2.82 and 2.83 bake following file, render and compare results.
blende2.82a.blend

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: GeForce 940MX/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 446.14 **Blender Version** Broken: version: 2.83.1, branch: master, commit date: 2020-06-25 09:47, hash: `8289fc688b` **Short description of error** Mantaflow smoke simulation looks different in 2.82 and 2.83 **Exact steps for others to reproduce the error** In Blender 2.82 and 2.83 bake following file, render and compare results. [blende2.82a.blend](https://archive.blender.org/developer/F8644910/blende2.82a.blend)

jagsir Khokhar commented

2020-06-26 05:45:06 +02:00

Added subscriber: @kkjagsir

Richard Antalik commented

2020-06-29 18:11:12 +02:00

Added subscriber: @iss

Richard Antalik commented

2020-06-29 18:11:12 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Richard Antalik commented

2020-06-29 18:11:12 +02:00

did you rebake this file in version 2.83? It is possible that there have been changes in how cache works and simulation needs to be re-baked

jagsir Khokhar commented

2020-06-30 05:10:02 +02:00

yes i re bake in blender 2.83 and blender 2.82a

Richard Antalik commented

2020-06-30 22:06:12 +02:00

I can not confirm that baking noise as specified will remove density as can be seen in following image.

Do you want to claim, that there are differences between baking simulation in 2.82 and 2.83?

I can not confirm that baking noise as specified will remove density as can be seen in following image. ![Untitled.png](https://archive.blender.org/developer/F8655760/Untitled.png) Do you want to claim, that there are differences between baking simulation in 2.82 and 2.83?

jagsir Khokhar commented

2020-07-02 18:26:03 +02:00

here i re baking in blender mantaflow simulation
after noise bake in blender 2.83.1

it remove density from simulation also viewport and render but in viewport display color mapping its showing density

but in blender 2.82a its working will

blend.mp4

blender.rar

here i re baking in blender mantaflow simulation after noise bake in blender 2.83.1 it remove density from simulation also viewport and render but in viewport display color mapping its showing density but in blender 2.82a its working will [blend.mp4](https://archive.blender.org/developer/F8660077/blend.mp4) [blender.rar](https://archive.blender.org/developer/F8660079/blender.rar)

Richard Antalik changed title from ~~mantaflow noise upres remove density~~ to Mantaflow smoke simulation render looks different in 2.82 and 2.83

2020-07-03 01:09:44 +02:00

Richard Antalik commented

2020-07-03 01:09:44 +02:00

Changed status from 'Needs User Info' to: 'Confirmed'

Richard Antalik commented

2020-07-03 01:11:43 +02:00

@kkjagsir Look of simulation in viewport in 2.83 has been changed - https://wiki.blender.org/wiki/Reference/Release_Notes/2.83/Physics
There is no mention about change in render, so I will confirm on basis of that. This may not be bug as well though

@kkjagsir Look of simulation in viewport in 2.83 has been changed - https://wiki.blender.org/wiki/Reference/Release_Notes/2.83/Physics There is no mention about change in render, so I will confirm on basis of that. This may not be bug as well though

Jacques Lucke commented

2020-07-13 15:12:05 +02:00

Added subscriber: @JacquesLucke

Jacques Lucke commented

2020-07-13 15:12:05 +02:00

Changed status from 'Confirmed' to: 'Needs User Info'

Jacques Lucke commented

2020-07-13 15:12:05 +02:00

Can you provide a side by side comparison of the old and new behaviors? Please also show how it looks like in Blender 2.90.
A 6 minute long video is too long to be useful here.

Can you provide a side by side comparison of the old and new behaviors? Please also show how it looks like in Blender 2.90. A 6 minute long video is too long to be useful here.

jagsir Khokhar commented

2020-07-15 06:20:43 +02:00

no now i can't do this , delete this post, i will never report anything ,thanks

Sebastián Barschkis commented

2020-07-20 12:32:05 +02:00

Added subscriber: @sebbas

Sebastián Barschkis commented

2020-07-20 12:32:05 +02:00

Changed status from 'Needs User Info' to: 'Resolved'

Sebastián Barschkis closed this issue

2020-07-20 12:32:05 +02:00

Sebastián Barschkis self-assigned this 2020-07-20 12:32:05 +02:00

Sebastián Barschkis commented

2020-07-20 12:32:05 +02:00

This looks like the same issue from #79029. I wrote a few tips over there which people from this thread might find interesting too.

Will close since it seems that @kkjagsir "will never report anything".

This looks like the same issue from #79029. I wrote a few tips over there which people from this thread might find interesting too. Will close since it seems that @kkjagsir "will never report anything".

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Mantaflow smoke simulation render looks different in 2.82 and 2.83 #78290