Godot Screen Pixel Jitter.

[ghost]

Godot version:
Godot 3.2.2 stable, and Godot 4.0
GLES 2,3 Vulkan

OS/device including version:

Windows 10 1909 , GTX 1070, I5 , 1360x780 screen.

Issue description:

Pixels snap randomly and offest and scaling isn't smooth and jitter, also screen differnets can snap the pixels randomly.

Pixel snap has no effect at all.
nor making the values smaller in godot source code.

Steps to reproduce:
Simply try to scale a sprite very slowly and you see line of tearing visible.
or change the viewport size while looking at your sprites.

Minimal reproduction project:
jitter.zip

[Calinou]

There is nothing that can be done about this with sprites that have filtering disabled. You must ensure that the scaling ratio is always an integer factor to avoid scaling artifacts. (At higher scale factors, this becomes less noticeable but the base problem remains.)

Duplicate of #6506.

[AttackButton]

I don't think this issue should be closed. Because in Godot version 3.2.4-beta-4 it is not fixed as stated in the #43194 description, even with pixel_snap enabled, this still happening.

Test using the op MRP with the pixel_snap option:

[mortarroad]

The jittering when sprites are scaled while using point sampling is inherent to the process.
However, it can be mitigated with some filtering, which will smoothly transition between neighboring pixels, while still keeping them pixelated.
I wrote a shader for that.

It should work as a drop in replacement.

Example:

Both sprites on the left are scaled by the same amount.
The bottom one has the new filter on it.

I hope this is useful to someone.
jitter.zip

[Zireael07]

@mortarroad: It would be awesome if you posted this shader on either https://godotshaders.com/ or Godot Assetlib or the Godot subreddit, so that people could find it easier.

[mortarroad]

Done: https://godotshaders.com/shader/sub-pixel-accurate-pixel-sprite-filtering/