Blender 2.83 Buggy and Glitchy Mantaflow fire animation in Cycles #77678

New Issue

Arken · 2020-06-09T12:14:04+02:00

Arken commented

2020-06-09 12:14:04 +02:00

System Information
PC 1
Operating system: Windows-10-10.0.18362-SP0 64 Bits
CPU Ryzen 1700X
Graphics card: Radeon RX 560 Series ATI Technologies Inc. 4.5.13587 Core Profile Context 20.4.1 26.20.15029.20013
8GB RAM

PC 2
Operating system: Windows-10-10.0.18362-SP0 64 Bits
CPU Ryzen 2700X
Graphics card: nVidia 1660 TI, latest driver
32GB RAM

Blender Version
Broken: version: 2.83.0, branch: master, commit date: 2020-06-03 14:38, hash: 211b6c29f7
Worked: v2.83 beta (from sometime in May)

Short description of error
When rendering a mantaflow fire or fire + smoke animation in Cyclesthe result is a glitchy and buggy mess of a file/files.

Exact steps for others to reproduce the error
So I've tried this on 2 different computers and 2 different versions of Blender 2.83 LTS and 2.9 alpha I've been doing this for a week. The results are the same.
And none of the PC's run out of memory or anything. This is a simple mataflow fire animation but there are some really serious show-stopping bugs. I've had Blender crash on me several times. No matter if the output are pictures or a single .mp4 file.

When I render a single frame in Cycles the render is correct most of the time, but not always.
When I render the animation in Cyles, 50% or more of the frames are glitched out.
When I render in EEVEE everything is fine, no problems.
I have also cleared the baked cache many times. And tried different locations.

I have only a single node, Principled Volume attached to the Volume input in Material Output in the Shader editor.
I have tested with many new files not just a single one .blend file.

This is how it Renders in EEVEE, which is correct.

This is the same file rendered in Cycles, that glitches out. This was with jpg output. Have tried with many mantaflow samples settings. Many different output settings. The results are always buggy in Cycles but not EEVEE.

Here's another Cycles render example with another file.

This is the file from the first example. But I have many more with the same problems.
mantaflow fire.blend

**System Information** PC 1 Operating system: Windows-10-10.0.18362-SP0 64 Bits CPU Ryzen 1700X Graphics card: Radeon RX 560 Series ATI Technologies Inc. 4.5.13587 Core Profile Context 20.4.1 26.20.15029.20013 8GB RAM PC 2 Operating system: Windows-10-10.0.18362-SP0 64 Bits CPU Ryzen 2700X Graphics card: nVidia 1660 TI, latest driver 32GB RAM **Blender Version** Broken: version: 2.83.0, branch: master, commit date: 2020-06-03 14:38, hash: `211b6c29f7` Worked: v2.83 beta (from sometime in May) **Short description of error** When rendering a mantaflow fire or fire + smoke animation in **Cycles**the result is a glitchy and buggy mess of a file/files. **Exact steps for others to reproduce the error** So I've tried this on 2 different computers and 2 different versions of Blender 2.83 LTS and 2.9 alpha I've been doing this for a week. The results are the same. And none of the PC's run out of memory or anything. This is a simple mataflow fire animation but there are some really serious show-stopping bugs. I've had Blender crash on me several times. No matter if the output are pictures or a single .mp4 file. When I render a single frame in Cycles the render is correct most of the time, but not always. When I render the animation in Cyles, 50% or more of the frames are glitched out. When I render in EEVEE everything is fine, no problems. I have also cleared the baked cache many times. And tried different locations. I have only a single node, Principled Volume attached to the Volume input in Material Output in the Shader editor. I have tested with many new files not just a single one .blend file. This is how it Renders in EEVEE, which is correct. ![blender 2.83 mantaflow fire in EEVEE.gif](https://archive.blender.org/developer/F8603624/blender_2.83__mantaflow_fire_in_EEVEE.gif) This is the same file rendered in Cycles, that glitches out. This was with jpg output. Have tried with many mantaflow samples settings. Many different output settings. The results are always buggy in Cycles but not EEVEE. ![blender 2.83 buggy and glitchy mantaflow fire in Cycles.gif](https://archive.blender.org/developer/F8603629/blender_2.83_buggy_and_glitchy_mantaflow_fire_in_Cycles.gif) Here's another Cycles render example with another file. ![blender 2.83 buggy and glitchy mantaflow fire in Cycles 2.gif](https://archive.blender.org/developer/F8603646/blender_2.83_buggy_and_glitchy_mantaflow_fire_in_Cycles_2.gif) This is the file from the first example. But I have many more with the same problems. [mantaflow fire.blend](https://archive.blender.org/developer/F8603648/mantaflow_fire.blend)

blender-admin commented

2020-06-09 12:14:04 +02:00

#77601 was marked as duplicate of this issue

blender-admin commented

2020-06-09 12:14:04 +02:00

#77501 was marked as duplicate of this issue

blender-admin commented

2020-06-09 12:14:04 +02:00

#77543 was marked as duplicate of this issue

Arken commented

2020-06-09 12:14:05 +02:00

Added subscriber: @Arken

Ankit Meel commented

2020-06-09 13:20:52 +02:00

Added subscriber: @PaulGriffin

Ankit Meel commented

2020-06-09 13:21:13 +02:00

Added subscribers: @Lazza, @nacioss

Ankit Meel commented

2020-06-09 13:21:42 +02:00

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

Arken commented

2020-06-09 14:54:51 +02:00

I would like to add that the viewport for Cycles works correctly.
So I managed to manually render with the "Save Screenshot" menu command.

And this is what it should look like in the final Cycles render

I would like to add that the viewport for Cycles works correctly. So I managed to manually render with the "Save Screenshot" menu command. And this is what it should look like in the final Cycles render ![blender 2.83 buggy and glitchy mantaflow fire in Cycles viewport save screen shot render.gif](https://archive.blender.org/developer/F8603877/blender_2.83_buggy_and_glitchy_mantaflow_fire_in_Cycles_viewport_save_screen_shot_render.gif)

Carlos Troncoso commented

2020-06-09 15:04:08 +02:00

Added subscriber: @schmicky

Carlos Troncoso commented

2020-06-09 15:04:08 +02:00

I have the same issue https://developer.blender.org/T77601
Happens only with Adaptive Domain + Noise.

Note: your eevee render is wrong as well. You've got fire were you should have smoke.
Try the same simulation on 2.82a. Get it on https://download.blender.org/release/Blender2.82/

While the bug is fixed, open your file on 2.82a, bake it on 2.82a and save.
Open on 2.83.0 and it should render fine.

I have the same issue https://developer.blender.org/T77601 Happens only with Adaptive Domain + Noise. Note: your eevee render is wrong as well. You've got fire were you should have smoke. Try the same simulation on 2.82a. Get it on https://download.blender.org/release/Blender2.82/ While the bug is fixed, open your file on 2.82a, bake it on 2.82a and save. Open on 2.83.0 and it should render fine.

Ankit Meel commented

2020-06-09 17:15:35 +02:00

Added subscriber: @ankitm

Wender Silva commented

2020-06-10 06:37:57 +02:00

Added subscriber: @wenderversaofull

Adam Burke commented

2020-06-10 21:21:13 +02:00

Added subscriber: @Adam-Burke

Marco commented

2020-06-17 12:55:34 +02:00

Removed subscriber: @nacioss

Philipp Oeser commented

2020-06-17 13:17:03 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2020-06-17 13:17:03 +02:00

There is also an issue with VDBs in the volume object [not sure this is related though] #77882 (Cycles VDB Artifacts (EEVEE WORKING))

Arken commented

2020-06-20 12:22:16 +02:00

Here's another example with only smoke.

Broken: version: 2.90.0 Alpha, branch: master, commit date: 2020-06-16 18:15, hash: c7b03fe9c0

If you pay attention you'll see halfway through the smoke simulation the simulation brakes, not to mention the glitchy final render.

mantaflow smoke 256 cycles 32.mov

Here's another example with only smoke. Broken: version: 2.90.0 Alpha, branch: master, commit date: 2020-06-16 18:15, hash: `c7b03fe9c0` If you pay attention you'll see halfway through the smoke simulation the simulation brakes, not to mention the glitchy final render. [mantaflow smoke 256 cycles 32.mov](https://archive.blender.org/developer/F8633519/mantaflow_smoke_256_cycles_32.mov) ![wind tunnel test.jpg](https://archive.blender.org/developer/F8633528/wind_tunnel_test.jpg)

Peter Javidpour commented

2020-07-07 22:19:08 +02:00

Added subscriber: @peterjavidpour

Jacques Lucke commented

2020-08-04 13:56:01 +02:00

Added subscriber: @JacquesLucke

Jacques Lucke commented

2020-08-04 13:56:01 +02:00

This has been fixed by 461ba2c74c.

This has been fixed by 461ba2c74c.

Jacques Lucke commented

2020-08-04 13:56:08 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Jacques Lucke closed this issue

2020-08-04 13:56:08 +02:00

Jacques Lucke self-assigned this 2020-08-04 13:56:08 +02:00

Sebastián Barschkis commented

2020-08-05 15:58:32 +02:00

Added subscriber: @sebbas

Sebastián Barschkis commented

2020-08-05 15:58:32 +02:00

I've been playing around with this a bit - the crash seems to be fixed.
@Arken Can you check what problems you still have. I had some jitter, this time with Eevee though.

I've been playing around with this a bit - the crash seems to be fixed. @Arken Can you check what problems you still have. I had some jitter, this time with Eevee though.

Sebastián Barschkis commented

2020-08-05 15:59:41 +02:00

Never mind - seems to be fixed now.

Benjamin Yeiser commented

2020-08-07 16:08:56 +02:00

Added subscriber: @Catalyst100

Benjamin Yeiser commented

2020-08-07 16:08:56 +02:00

In #77678#991288, @sebbas wrote:
Never mind - seems to be fixed now.

In which version?

> In #77678#991288, @sebbas wrote: > Never mind - seems to be fixed now. In which version?

Sebastián Barschkis commented

2020-08-07 19:13:49 +02:00

@Catalyst100 The commit is in both the upcoming 2.90 and 2.91 (master).

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

Blender 2.83 Buggy and Glitchy Mantaflow fire animation in Cycles #77678