Mantaflow "Replay" cache not working as expected #75174

New Issue

Jesse · 2020-03-28T23:53:51+01:00

Jesse commented

2020-03-28 23:53:51 +01:00

System Information
Operating system: Darwin-18.7.0-x86_64-i386-64bit 64 Bits
Graphics card: NVIDIA GeForce GTX 660M OpenGL Engine NVIDIA Corporation 4.1 NVIDIA-12.0.24 355.11.10.50.10.103

Blender Version
Broken: version: 2.83 (sub 11), branch: master, commit date: 2020-03-27 23:12, hash: 1f949121cd

Short description of error
The replay/live preview and modular and final in the mantaflow fluid simulator won’t work for me. I tried deleting the cache folder and making a new one and changing some settings in the mantaflow simulator and changing them back to try to clear the cache but that still didn’t work. Someone on the cg cookie forum said it might be an operating system specific bug.

Exact steps for others to reproduce the error
open blend file and select replay/live preview beside cache type and press play in the timeline or select modular and press bake data or select final and press bake all and press play in the timeline nothing will show up for both of these cache types

Mantaflow.blend

video of problem.mp4

**System Information** Operating system: Darwin-18.7.0-x86_64-i386-64bit 64 Bits Graphics card: NVIDIA GeForce GTX 660M OpenGL Engine NVIDIA Corporation 4.1 NVIDIA-12.0.24 355.11.10.50.10.103 **Blender Version** Broken: version: 2.83 (sub 11), branch: master, commit date: 2020-03-27 23:12, hash: `1f949121cd` **Short description of error** The replay/live preview and modular and final in the mantaflow fluid simulator won’t work for me. I tried deleting the cache folder and making a new one and changing some settings in the mantaflow simulator and changing them back to try to clear the cache but that still didn’t work. Someone on the cg cookie forum said it might be an operating system specific bug. **Exact steps for others to reproduce the error** open blend file and select replay/live preview beside cache type and press play in the timeline or select modular and press bake data or select final and press bake all and press play in the timeline nothing will show up for both of these cache types [Mantaflow.blend](https://archive.blender.org/developer/F8434157/Mantaflow.blend) [video of problem.mp4](https://archive.blender.org/developer/F8434156/video_of_problem.mp4)

Jesse commented

2020-03-28 23:53:51 +01:00

Added subscriber: @Blendergeek24

blender-admin commented

2020-03-28 23:53:51 +01:00

#75201 was marked as duplicate of this issue

Jesse changed title from ~~Mantaflow replay/live preview and modular and final won't work.~~ to Mantaflow replay/live preview and modular and final won't work on iMac

2020-03-28 23:54:36 +01:00

Evan Wilson commented

2020-03-30 11:24:42 +02:00

Added subscriber: @EAW

Evan Wilson commented

2020-03-30 11:24:42 +02:00

I ran the file from #75201, and there was nothing there at first. Baking did nothing. I created a cube, and applied Quick Fluid to it. I was able to bake that and play it back successfully. I then switched back to your simulation, and baking was working again, I renamed the cache folder before each bake. The blender_debug_output.txt is filled with

Unable to delete file```

I think the issue is that you named the cache folder, which seams to cause Blender not delete it or its contents.  This isn't noted in the manual as far as I can see.  Try renaming the baking cache folder and then re-bake.

I ran the file from #75201, and there was nothing there at first. Baking did nothing. I created a cube, and applied `Quick Fluid` to it. I was able to bake that and play it back successfully. I then switched back to your simulation, and baking was working again, I renamed the cache folder before each bake. The blender_debug_output.txt is filled with ```Unable to remove directory Unable to delete file``` I think the issue is that you named the cache folder, which seams to cause Blender not delete it or its contents. This isn't noted in the manual as far as I can see. Try renaming the baking cache folder and then re-bake.

Jesse commented

2020-03-30 16:35:27 +02:00

I renamed the cache folder to just CACHE in all caps an rebaked the simulator but that still didn't work. Plus I think I rememberer my first attempt of getting mantaflow to work and I think I didn't rename the cache folder then and it still didn't work .

I renamed the cache folder to just CACHE in all caps an rebaked the simulator but that still didn't work. Plus I think I rememberer my first attempt of getting mantaflow to work and I think I didn't rename the cache folder then and it still didn't work . ```

Jesse commented

2020-03-31 02:07:52 +02:00

Just a little update I tried mantaflow again in the latest alpha still didn't work.

Sebastián Barschkis commented

2020-03-31 12:21:23 +02:00

Added subscriber: @sebbas

Sebastián Barschkis commented

2020-03-31 12:21:23 +02:00

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

Sebastián Barschkis commented

2020-03-31 12:21:23 +02:00

Hi, yes I noticed this too. Working on a fix for this now.

Sebastián Barschkis commented

2020-04-15 18:14:59 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Sebastián Barschkis closed this issue

2020-04-15 18:14:59 +02:00

Sebastián Barschkis self-assigned this 2020-04-15 18:14:59 +02:00

Sebastián Barschkis commented

2020-04-15 18:14:59 +02:00

In 7de86ad61f there have been some changes that improve baking with the 'Replay' mode. Those should fix the issues you had over there.

Also, in the file that you attached make sure to Apply -> All Transforms and to Recalculate Normals for the liquid inflow object.

In 7de86ad61fb1 there have been some changes that improve baking with the 'Replay' mode. Those should fix the issues you had over there. Also, in the file that you attached make sure to `Apply -> All Transforms` and to `Recalculate Normals` for the liquid inflow object.

Sebastián Barschkis changed title from ~~Mantaflow replay/live preview and modular and final won't work on iMac~~ to Mantaflow "Replay" cache not working as expected

2020-04-15 18:16:58 +02:00

Thomas Dinges added this to the 2.83 LTS milestone 2023-02-08 16:38:06 +01:00

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Mantaflow "Replay" cache not working as expected #75174