"No scene camera is selected" in batch mode despite valid .sg structure

[JindrichNikodem]

Environment:

OSPRay Studio version: 1.1.0

Platform: Windows 11

Mode: Batch mode (--batch)

I'm trying to render a scene in batch mode using a custom .sg file. The file includes a properly defined camera node with cameraToWorld, and it's connected via a frame node that includes camera, renderer, and world as children.

Despite this, OSPRay Studio fails with:

No scene camera is selected.
using default camera...

and scene has still default camera.

As a result, the scene still uses the default camera.

OSPRay Studio
OpenImageDenoise is available
Batch mode
!!! When loading a scene file (.sg), fewer command-line arguments are permitted.
!!! If the application exits unexpectedly, please check below for errors,
!!! remove any 'not expected' arguments and try again.
...importing files!
Importing a scene
Importing: C:\OBJ\export.obj
... found 170185 triangles and 0 quads.
...finished import!
No scene camera is selected.
using default camera...
frame 1 variance inf
frame 1 variance inf
frame 2 variance 0.275454
Warning: saving a 32-bit float buffer as PNG; color space will be limited.
Saved to C:\obj\render_output.png.00000.png
...finished!

The attached file contains my .sg scene for batch mode.

Question: How should I define the camera node in the .sg file so that it is correctly recognized in --batch mode?

scene3.json

[BruceCherniak]

I apologize for the delay in replying to this issue, I have since retired from Intel and do not check issues very often.

I was able to root cause this failure to a change in .../app/Batch.cpp between release v0.12.0 and v0.12.1. Commit bf4d8bc line 95.

There is a one-line change that should fix it on main branch if you can compile from source. Simply re-add the if (!sgScene) directly above updateCamera()

ospray-studio/app/Batch.cpp

Line 109 in 34fa395

updateCamera();

      else {
        // Only update camera if not using a scene file, for scene file camera
        // has already been set during import
        if (!sgScene)
          updateCamera();
        render();

I do hope this is still useful to you.