The image is of type png, but OSM2World indicates a **jpeg ** reference. Il I change manually theses data in the file, the scene can be rendered with POVRay.
Thank you for debugging the problem! With this thorough information, I’ve been able to spot the issue and it’s a 3 line fix in the source code. I’ll include it in the next release.
(Just a fair warning: OSM2World’s POVRay export is kind of neglected, so I can’t guarantee continued maintenance and it doesn’t seem as if anyone else is interested in working on that part of the codebase at the moment. But for something this small, I’m happy to include the fix.)