Camera3D.UnprojectPosition not accurate on higher resolutions

[Byteron]

Godot version

4.0.dev

System information

Windows 11, AMD CPU & GPU

Issue description

Camera3D.UnprojectPosition() is not accurate with higher resolutions.

the below images how unit plates that are placed on a canvas layer where the units are, using Camera3D.UnprojectPosition.

default res

2560x1440

The relevant code snippet:

if (camera.IsPositionBehind(Position))
        {
            Hide();
        }
        else
        {
            Show();
            RectPosition = camera.UnprojectPosition(Position);
        }

Steps to reproduce

1. create empty project, place a cube onto some world position, and a label onto the same world position via Camera3D.UnprojectPosition. Also add Camera3D, naturally.
2. change resolution to something bigger than 1920x1080 (at 1080 I found this both work and not work depending on being borderless or not)
3. Label should be offset.

Minimal reproduction project

No response

[Calinou]

Related to #52295 and #34805.

Which stretch mode are you using in the project? You most likely need to multiply/divide the coordinates by the scale factor (which you can determine by dividing the current window height with the base window height, 1080 in your case).

[Byteron]

I have stretch mode set to ignore.

[Byteron]

note that I don't use resizing.
the 1440p image is with that resolution set in the project settings, so it IS the base resolution.

[madmiraal]

Probably fixed with #57082; although it's impossible to verify without an MRP, and I'm unable to reproduce the problem with the instructions provided.

[KoBeWi]

Closing based on the above comment (and lack of activity since then). Comment if you can still reproduce in newest master.