Godot-proposals: Add picture-in-picture camera previews to the editor when a Camera3D node is selected

[bjr29]

Describe the project you are working on:
3D Game

Describe the problem or limitation you are having in your project:
Can't easily tell what is visible on the camera.

Describe the feature / enhancement and how it helps to overcome the problem or limitation:
To have a small pop-up window like in Unity showing what is in the camera's view.

Describe how your proposal will work, with code, pseudocode, mockups, and/or diagrams:

If this enhancement will not be used often, can it be worked around with a few lines of script?:
Nope

Is there a reason why this should be core and not an add-on in the asset library?:
I image quite a few people would find this feature helpful.

Bugsquad edit (keywords for easier searching): picture in picture, PiP

[NoodleSushi]

This could be really helpful. I wouldn't need to simultaneously switch to preview mode or manually type my coordinates when repositioning my Camera.

[Jummit]

What's the problem with multiple viewports?

[Zireael07]

Too big for what we really need, @Jummit

[KoBeWi]

There's an option "Align Transform with View" under Perspective menu that will automatically position the camera to your current view, so you can align it even without preview.

[bjr29]

What if you want to see it with the selected camera's settings?

[Razoric480]

When using culling masks, you can't preview what a specific effect looks because the editor camera sees all, so you enter preview. But you can't move the preview camera, or see what it sees in a preview thumbnail, so you can't look at your effect from different angles short of using multiple views.

Either way, the camera preview system could use some additional functionality.

[dodgyville]

Being able to view the object from its perspective while modifying the object's attributes is a big feature for me. This is a great proposal to solve the problem. Would also love to see it applied to all 3D node types such as spotlights.