Installed the Windows11 2026-06 Security Update (KB5094126) (26200.8655) a couple nights ago (6/10/26) and suddenly some of my scenes are randomly missing materials and a lot of the materials have their order changed in the rendering pipeline for some reason (ex: you can see things through other meshes). Has anyone else had this problem? None of these problems occurred before in this project so my only lead is that the windows update messed something up. I also updated my graphics drivers after these issues started happening but I honestly have no idea what to do other than rollback the windows update. Could some sort of project corruption cause this as well?
Turns out I’m a little silly and the see through materials was because I added ALPHA = rgb.a; in my material shader and didn’t realize that would cause weird behavior. On the other hand I still have no idea why the materials disappeared from the cat mesh in the cutscene_1 scene.
When you ran Windows Update, did you also run a video card driver update? That’s the most likely cause of sudden visual changes like this.
The best change is to change your windows driver to d3d12. Since Godot 4.6, this is the default, but if you upgraded your project from something pre-4.6, then it’s likely still using Vulkan.
Change it and the problem should go away (once you restart Godot). Both NVidia and ATI are known to have awful Vulkan support, and often roll out upgrades that keep it from working for weeks or months before they fix it.
The other option is to downgrade your video drivers to a version that makes the problem go away.
