Summary
Hi everyone,
We are currently evaluating an upgrade from Unreal Engine 5.6 to 5.7/5.8 and have run into a regression with our nDisplay setup.
Our setup uses custom nDisplay configurations together with VIOSO calibration (.vwf) files for a cylindrical projection environment consisting of five projectors (1900×1200 each).
UE 5.6 and earlier
Everything works as expected.
The projection preview inside the Editor is not rendered correctly (this has always been the case for us).
However, once the project is packaged and launched via the appropriate nDisplay command line, the projection is correct and behaves as expected.
UE 5.7
The behavior changes significantly.
The projection is now displayed in the Editor.
Unfortunately, the projection itself is completely incorrect compared to the expected VIOSO calibration.
UE 5.8
The situation becomes even worse.
The Editor suffers from severe performance issues whenever the map containing the nDisplay configuration is loaded.
Navigating the viewport becomes noticeably slow.
After some time, the Editor eventually crashes.
At the moment we are investigating the engine source to determine where this regression was introduced, but I wanted to ask whether anyone else has experienced similar issues.
Has anyone successfully migrated a VIOSO-based nDisplay setup from 5.6 to 5.7 or 5.8? Is this a known issue, or are there any workarounds that we should investigate?
Any information or similar experiences would be greatly appreciated.
Thank you!
What Type of Bug are you experiencing?
Virtual Production
Steps to Reproduce
- open nDisplay example project in UE 5.8
- duplicate existing ndisplay configuration (NDC_Basic)
- change the projection policy of the one viewport (VP) to the VIOSO and provide file
- observe editor getting a serious performance hit
Expected Result
Editor does not have issues with having VIOSO projection policy active with a provided calibration file (.vwf).
Observed Result
Serious performance hit to editor.
Affects Versions
5.8
5.7
Platform(s)
Windows
Additional Notes
I’ve tested with the regular UE 5.8 version through the Epic Games Launcher.