QT5 IPR - Consistent Crashing when Zoom/Pan
Posted: Thu Oct 23, 2025 5:19 pm
Hello!
(I originally posted this in the 2025.3.0 release thread, but reposting here for appropriate categorization.)
I'm seeing a strange performance issue that I suspect is related to the new IPR QT5 overhaul.
I've been able to replicate this issue consistently across different scenes, both complex and extremely simple. After the IPR image posts, zooming in/out and panning around the IPR eventually leads to a full Houdini crash. This typically occurs after roughly 10-15 seconds of the IPR running, and appears specifically tied to zooming in/out.
I've recorded the Octane Debug Log, and will attach here for reference. Across all attempts to diagnose this, the crash happens when this action is taken: 'Drawing the raster buffer in the Qt5 image window'.
Here's some relevant information:
Houdini: 20.5.684
Octane: 2025.3.0.0
Windows 10 Pro, OS Build 19045.6456
NVIDIA Studio Driver: 581.57
CPU: Intel(R) Xeon(R) W-3175X CPU @3.10GHz
GPU: NVIDIA GeForce RTX 3090
RAM: 64 GB
You'll find attached:
- Screen recording of the issue
- Troubleshoot HIP file
- Octane Debug Log
Thanks,
Aaron
(I originally posted this in the 2025.3.0 release thread, but reposting here for appropriate categorization.)
I'm seeing a strange performance issue that I suspect is related to the new IPR QT5 overhaul.
I've been able to replicate this issue consistently across different scenes, both complex and extremely simple. After the IPR image posts, zooming in/out and panning around the IPR eventually leads to a full Houdini crash. This typically occurs after roughly 10-15 seconds of the IPR running, and appears specifically tied to zooming in/out.
I've recorded the Octane Debug Log, and will attach here for reference. Across all attempts to diagnose this, the crash happens when this action is taken: 'Drawing the raster buffer in the Qt5 image window'.
Here's some relevant information:
Houdini: 20.5.684
Octane: 2025.3.0.0
Windows 10 Pro, OS Build 19045.6456
NVIDIA Studio Driver: 581.57
CPU: Intel(R) Xeon(R) W-3175X CPU @3.10GHz
GPU: NVIDIA GeForce RTX 3090
RAM: 64 GB
You'll find attached:
- Screen recording of the issue
- Troubleshoot HIP file
- Octane Debug Log
Thanks,
Aaron