Blender command line render not evaluating physics #99680

New Issue

Stephen Imhoff · 2022-07-14T00:55:24+02:00

Stephen Imhoff commented

2022-07-14 00:55:24 +02:00

System Information
Operating system: Ubuntu 22.04
Graphics card: Nvidia GeForce RTX 2080

Blender Version
Broken: 3.2.1
Worked: Unknown, pre 3.0

Short description of error

When rendering an animation from the command line, blender does not evaluate physics, instead placing active physics objects at the origin or initial starting location.

Exact steps for others to reproduce the error

Given the example blend file;
untitled.blend

Expected behavior:
- Open blend file.
- Press Render -> Render Animation (or Ctrl+F12).
- Observe a series of frames rendering with a cube being carried on a plane.
  expected.webm
Command-line Cycles behavior
Render from the command line: blender -b untitled.blend -s 1 -e 72 -o ~/some_location/ -a
Observe the output frames with the cube rendered at the origin.
cycles.webm
Command-line EEVEE behavior
Render from the command line: blender -b untitled.blend -s 1 -e 72 -o ~/some_location/ --engine BLENDER_EEVEE -a
Observe the output frames with the cube rendered at its initial location.
eevee.webm

**System Information** Operating system: Ubuntu 22.04 Graphics card: Nvidia GeForce RTX 2080 **Blender Version** Broken: 3.2.1 Worked: Unknown, pre 3.0 **Short description of error** When rendering an animation from the command line, blender does not evaluate physics, instead placing active physics objects at the origin or initial starting location. **Exact steps for others to reproduce the error** Given the example blend file; [untitled.blend](https://archive.blender.org/developer/F13291209/untitled.blend) - Expected behavior: - Open blend file. - Press Render -> Render Animation (or Ctrl+F12). - Observe a series of frames rendering with a cube being carried on a plane. [expected.webm](https://archive.blender.org/developer/F13291068/expected.webm) - Command-line Cycles behavior - Render from the command line: `blender -b untitled.blend -s 1 -e 72 -o ~/some_location/ -a` - Observe the output frames with the cube rendered at the origin. [cycles.webm](https://archive.blender.org/developer/F13291089/cycles.webm) - Command-line EEVEE behavior - Render from the command line: `blender -b untitled.blend -s 1 -e 72 -o ~/some_location/ --engine BLENDER_EEVEE -a` - Observe the output frames with the cube rendered at its initial location. [eevee.webm](https://archive.blender.org/developer/F13291098/eevee.webm)

Stephen Imhoff commented

2022-07-14 00:55:24 +02:00

Added subscriber: @Clockwork-Muse

Stephen Imhoff commented

2022-07-14 01:09:08 +02:00

Note that I found this while attempting to reproduce a different bug: while rendering from the UI, physics-enabled objects were rendering a frame late/behind (this was at 1fps, so really obvious). I was able to trigger it a second time, but have not managed to get a working repro.
This feels like a more terrifying bug, though.

Note that I found this while attempting to reproduce a different bug: while rendering from the UI, physics-enabled objects were rendering a frame late/behind (this was at 1fps, so really obvious). I was able to trigger it a second time, but have not managed to get a working repro. This feels like a more terrifying bug, though.

Omar Emara commented

2022-07-18 10:40:53 +02:00

Closed as duplicate of #99700

Omar Emara closed this issue

2022-07-18 10:40:53 +02:00

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Blender command line render not evaluating physics #99680