Antialiasing property is ignored when rendering Line2D or Polygon2D

[poiati]

Godot version

4.0-alpha11

System information

Linux 5.18.9-arch1-1, NVIDIA driver version 515.57, RTX 3060

Issue description

Antialiasing properties of the Line2D and Polygon2D nodes are being ignored. They are not being sent to the RenderingServer when being drawn.

A side question: does MSAA or other project-level antialias settings affect the 2D renderer?

Steps to reproduce

Add any Line2D or Polygon2D. Toggling the antialias property of them does not have any effect.

Minimal reproduction project

No response

[Calinou]

They are not being sent to the DisplayServer when being drawn.

I think you meant RenderingServer 🙂

A side question: does MSAA or other project-level antialias settings affect the 2D renderer?

No, as MSAA/FXAA/TAA only affect 3D rendering.

[poiati]

They are not being sent to the DisplayServer when being drawn.

I think you meant RenderingServer slightly_smiling_face

A side question: does MSAA or other project-level antialias settings affect the 2D renderer?

No, as MSAA/FXAA/TAA only affect 3D rendering.

Yes, RenderingServer! Sorry.

[AcatXIo]

I can confirm the issue for version 4.2.dev4, for both compatibility and mobile renderers, the antialiased = true property does nothing, no matter what other settings I tried to use.

[Calinou]

I'd suggest using godot-extended-libraries/godot-antialiased-line2d#8 (which I haven't merged yet, as I ran into some visual issues that are also present in 3.x for some reason).

[IllustratedMan-code]

Can confirm that this is still a problem in 4.2.x. I assume that this means that there is currently no way to get an antialiased line2D correct?

[Calinou]

I assume that this means that there is currently no way to get an antialiased line2D correct?

You can use the fork of the AntialiasedLine2D add-on from here: https://github.com/OmarShehata/godot-antialiased-line2d/tree/master

[IllustratedMan-code]

Thanks, I think I will go that route! I do wonder why draw_line can draw antialiased lines, but Line2D cannot. Is there some big problem preventing this from being fixed?

[Calinou]

I do wonder why draw_line can draw antialiased lines, but Line2D cannot

Line2D doesn't rely on draw_line() but relies on a procedurally generated polygon instead. This is done because draw_line() is far less flexible than a custom solution like Line2D is. For instance, it doesn't support textured lines, variable width, bevel/round cap/joint types and so on.

Fixing this issue requires redoing #43828 but in Line2D. Maybe @Chaosus could take a look at this?