In Apple's slides it says that 4GB of VRAM is required.

Thanks for the tip. I created a batch in Photoshop that brightens the image and that does help. Photoshop doesn't support saving in the original file format .HEIC, so I'm using .JPEG. Problem is that the size data of the object is lost in the process, so the object created from the images in my example becomes too big. Is there a way to retain the size data of the image when converting to .JPEG? Or copying it afterwards? Removing the gravity and depth files when processing .HEIC -files has no effect, so the size data has to be inside the .HEIC -file. Thanks for any help!

Started happening after updating to Ventura. Ventura 13.2 + Xcode 14.2 Deleting DerivedData helps, but have to do before every build.