My outline overlay material is not displayed when the sky is behind it.

[Turnspender]

I wanted to display an outline around a mesh, and followed this method. Its graph looks like this.

It works fine, except when it shows the front of the sky directly. It will end up like this.

I’m new to tinkering materials, so I have no idea what to do (or what to learn) from here.

[ClockworkOcean]

Have you tinkered with the sky sphere mesh settings?

[Turnspender]

Yes, it has no effect on this matter.