ered completely white after update

[ubas]

I am having a problem with the display of 3D PDF files containing U3D models in PDF-XChange Editor.

Until a few months ago, these 3D models were displayed correctly on my laptop. After installing a PDF-XChange Editor update, the problem appeared: the 3D components are now rendered completely white, so surface details, contours and geometry are no longer properly visible.

The 3D model itself is loaded and interactive. I can rotate, pan and zoom it, the 3D Model Tree is available, and PDF-XChange identifies the model as U3D. However, the component itself remains essentially a solid white shape without proper surface shading.

We have already made a direct comparison with a colleague's computer:

We are using the same PDF-XChange Editor version/build.
We opened the exact same 3D PDF file.
We compared the PDF-XChange settings point by point, including the Multimedia 3D settings, and they appear to be identical.
On my colleague's computer, the 3D components are displayed correctly with their surface details.
On my laptop, the components are displayed completely white.

I have also tried different rendering modes, lighting schemes and background colors. Changing the background to dark makes the white model visible, but there is still no proper surface shading or visible surface detail.

Interestingly, when I select “Shaded Wireframe”, the component itself disappears completely and only the bounding box remains visible.

One potentially important hardware difference is that my laptop uses a Qualcomm Snapdragon X Elite processor and therefore runs Windows on ARM (ARM64). I understand that this platform also uses Qualcomm/Adreno graphics rather than a conventional Intel/AMD/NVIDIA graphics environment.

Since the same 3D PDF, the same PDF-XChange Editor version/build and apparently the same application settings work correctly on my colleague's computer, I suspect that the problem may be related to the local 3D rendering environment.

Could this issue be related to Windows on ARM / ARM64, the Snapdragon X Elite platform, the Qualcomm Adreno graphics driver, or PDF-XChange's U3D rendering on this hardware?

Is there a way to reset the 3D rendering engine or its configuration, or are there any graphics/driver settings that I should check?

The fact that the same laptop displayed these 3D PDFs correctly before the PDF-XChange update may also be relevant.

I would be happy to provide screenshots, my exact PDF-XChange build number, Windows version, graphics driver information, or a sample 3D PDF if required.

Thank you very much for your help.

[Willy Van Nuffel]

Hi,

Just a guess:

1) "Override Document Colors" has been turned on via the File-menu > Preferences > Accessibility (or CTRL + SHIFT + 6)

2) "Dark Page Mode" has been activated via Help > UI Theme

If this does not help, then please post an exemple PDF.

Kind regards.