Camera2d smoothing sprite position jittering

[Kacper-Kondracki]

Godot version: 3.3

OS/device including version: Windows 10 20H2

Issue description:
When the camera2d with the smoothing option enabled is the child of player, the player sprite jitters despite I enabled pixel snap.
This bug occurs in both 2d and viewport rendering mode

The player sprite should be perfectly aligned with the wall

Steps to reproduce:

1. Use pixel sprites
2. Add camera2d as child to player
3. Enable smoothing
4. Collide the player with wall and observe

Minimal reproduction project:

Nowy projekt gry2.zip

[Calinou]

See #43800. As you can see with the reverted pull requests, solving this is a difficult problem and has been postponed to 3.4 or later. It may be possible to provide a solution on an add-on level until this is fixed in core.

[Wladastic]

I was told in another issue that this can be fixed by just setting the renderer to physical instead of idle.
Works for me.
The framerate just doesn't match the updating process which makes it jump like that.