How to avoid a blank render when using Mitsuba in Blender

[AnsonSavage]

Hello!

I successfully installed Mitsuba in Blender:

Modules Installed (mitsuba-blender) from '/home/Downloads/Software/mitsuba-blender.zip' into '/home/.config/blender/4.2/scripts/addons'

I then switch the render engine to Mitsuba to try and render the default cube, and I get the following error:

Traceback (most recent call last):
  File "/home/.config/blender/4.2/scripts/addons/mitsuba-blender/engine/final.py", line 42, in render
    self.converter.scene_to_dict(depsgraph)
TypeError: SceneConverter.scene_to_dict() missing 1 required positional argument: 'window_manager'

The rendering window appears, but the default cube does not (it only shows a transparent background). It seems like this user had a similar error.

Any thoughts?

Thanks!

[AnsonSavage]

Ah, it turns out that Mitsuba doesn't actually work as a render engine in Blender, even though it shoes up as a Render Engine. The main working functionality is the XML export.

See this answer: https://blender.stackexchange.com/questions/330254/mitsuba-3-for-blender

and this answer: #49

[merlinND]

Hello @AnsonSavage,

There is major work in #121 to make Mitsuba a full-fledged render engine, but it hasn't been merged yet.