Mantaflow cycles render fails when started via Python #73618

New Issue

Evan Ryan · 2020-02-05T21:28:29+01:00

Evan Ryan commented

2020-02-05 21:28:29 +01:00

System Information
Operating system: CentOS Linux
Graphics card: GTX 1080 Driver Version: 418.88

Blender Version
Broken: (example: 2.83 Alpha, Hash-cd0a02862404, master, 2020-02-04)

Description
If a mantaflow smoke object exists Rendering with F12 or Ctrl+F12 works as expected. If python is used to initiate a render (via internal GUI console or command line with the flag -P) the mantaflow domain isn't rendered, an error ( below ) is produced, and blender hangs.

error...

Traceback (most recent call last):
File "<string>", line 55, in <module>
NameError: name 'Vec3Grid' is not defined
Traceback (most recent call last):
File "<string>", line 3, in <module>
NameError: name 'PcMGDynamic' is not defined

To reproduce the error, have a cached mantaflow domain and initiate a render from python (bpy.ops.render.render()) either from within an open blender GUI or from command line (blender -b mantaflow_included.blend -P render.py)

mantaflow_included.blend
render.py

**System Information** Operating system: CentOS Linux Graphics card: GTX 1080 Driver Version: 418.88 **Blender Version** Broken: (example: 2.83 Alpha, Hash-cd0a02862404, master, 2020-02-04) **Description** If a mantaflow smoke object exists Rendering with F12 or Ctrl+F12 works as expected. If python is used to initiate a render (via internal GUI console or command line with the flag -P) the mantaflow domain isn't rendered, an error ( below ) is produced, and blender hangs. error... ``` Traceback (most recent call last): File "<string>", line 55, in <module> NameError: name 'Vec3Grid' is not defined Traceback (most recent call last): File "<string>", line 3, in <module> NameError: name 'PcMGDynamic' is not defined ``` To reproduce the error, have a cached mantaflow domain and initiate a render from python (bpy.ops.render.render()) either from within an open blender GUI or from command line (blender -b mantaflow_included.blend -P render.py) [mantaflow_included.blend](https://archive.blender.org/developer/F8323866/mantaflow_included.blend) [render.py](https://archive.blender.org/developer/F8323867/render.py)

Evan Ryan commented

2020-02-05 21:28:29 +01:00

Added subscriber: @evantryan

Evan Ryan changed title from ~~Mantaflow render fails~~ to Mantaflow render fails when started via Python

2020-02-05 21:31:45 +01:00

Evan Ryan changed title from ~~Mantaflow render fails when started via Python~~ to Mantaflow cycles render fails when started via Python

2020-02-05 21:31:57 +01:00

Jacques Lucke commented

2020-02-06 15:36:41 +01:00

Added subscriber: @sebbas