Tweening Orthogonal projection to/from Perspective projection has inconsistent behavior?

[brianrodri]

I'm having trouble understanding how to tween between Orthogonal and Perspective cameras with consistent behavior. Please see:

Screen.Recording.2025-01-28.at.22.32.13.mov

For some reason, the transition only works once. Additionally, I need to enable "Priority Override" on the Orthogonal camera first to even get the behavior I'm looking for (the first transition in the video). Every subsequent transition zooms in/out instead of staying overhead.

Here are the reproduction steps:

• Make the following changes to 3d_tweening_example_scene:
  • PlayerPhantomCamera3D
    • Follow Parameters / Follow Offset / y = 4
  • Linear/PhantomCamera3D
    • Priority Override = true
    • Camera 3D Resource / Projection = Orthogonal
    • Camera 3D Resource / Size = 8
• Debug the scene
• Move in/out of area -> transition works only once; subsequent tries behave differently

If Priority Override is not enabled, then all transitions behave like the "subsequent" ones in the video. Is there something I'm missing here to get the tween to behave like the first one consistently?

Please let me know if there's anything more I can clarify, finding the words for this question was surprisingly difficult 😅

[ramokz]

There isn't currently support to tween between an Orthogonal and Perspective PCam. At least, I haven't added anything to support it.
So if it appears as expected in one direction, then that is most likely Godot making the effect work under-the-hood.

I did consider looking into that when I initially added the Camera3D Resource, however it's not the most trivial thing to properly support.
The general goal has been to prioritize more widely requested features, and considered the use-cases for this to be more niche compared to others.

But feel free to submit an issue with a feature request for this.
It will also help gauge whether this is a widely requested feature or not.

[brianrodri]

Got it, I've opened a feature request in #456. Thanks!