How can I prevent Veras to read the sky as a ceiling?
I don’t know that it can be prevented, necessarily… But are you familiar with using the selection/pen tool in the “Edit” tab?
No, not really? - I’ll have to test that next time
this is an old gif, so ignore the differences in the UI (e.g. “refine” vs “edit”), but this is a nice little example of how it works, which you can refer to.