Texture stitcher: rewrite box packing and fix different resolution stitching

[mchorse]

No description provided.

[mchorse]

Oh... I didn't realize that the new commit will be added to this PR. I hope it's not a big deal that two plugin updates are in a single PR?

[JannisX11]

Yeah, please only update one plugin per PR. You can create different PRs on the same repository by using different branches.

[mchorse]

Yeah, please only update one plugin per PR. You can create different PRs on the same repository by using different branches.

I fixed it.

[JannisX11]

Is it intentional that box UV support was removed?

[mchorse]

Is it intentional that box UV support was removed?

It appears not, I guess I removed it during implementation and forgot to reimplement it once I got per-face working. 😅

[JannisX11]

Per-element box UV is not working. Might not have worked before either.

[mchorse]

Per-element box UV is not working. Might not have worked before either.

I wasn't aware of its existence. I'll try making it work.