[TF2] Incorrect lightmap in prop

[Ashe_tfwiki]

I followed this guide: https://tf2maps.net/threads/how-to-setup-a-propper-gernerated-model-for-light-mapping.38979/ . However, the result wasn't good. Clearly, shadows looks wrong.

Is this a problem the UV map? Incorrect UV map? A limitation with the engine? Is the guide wrong?

 

[worMatty]

As I understand it this happens when parts of the model use the same area of the UV map. Since this is a very small texture the UV map is probably also small. I read the guide but couldn't quite understand what they were doing.