CameraAttributes not available in 2D

[h0lley]

Godot version

v4.0.beta.custom_build [84c404f]

System information

Ubuntu, Vulkan, Nvidia

Issue description

In Godot 3, effects such as DOF near blur and auto exposure have been very useful in 2D. Since these effects have now been moved to CameraAttributes, they no longer apply to 2D.

Examples:

I've been using auto exposure to get a better handle on calibrating glow. Without it, it was difficult not to get extremely exaggerated glow in situations such as where your game cycles through day and night.

I've been using DOF near blur to do things like blurring the game world during on the pause screen:

while this should be achievable with a shader, too, it was really nice to be able to do this with a simple WorldEnvironment setting.

Related: godotengine/godot-proposals#4564

Steps to reproduce

1. Add a WorldEnvironment node to your 2D scene
2. Attempt to apply any effect to your scene using CameraAttributes
3. Sad

Minimal reproduction project

please let me know if desirable

[h0lley]

I toyed some more around with environment settings and mostly achieved what I had in 3.x with 4.0.
Got an almost identical blur effect with glow_blend_mode set to RenderingServer.ENV_GLOW_BLEND_MODE_REPLACE
and the exposure issue is mitigated by adjusting tonemap_exposure.

It still looks quite different from how it did in 3.x, but I think I can work with it.

[clayjohn]

You just need to add a Camera3D to your scene for DoF and auto-exposure to work in a 2D scene (and set background to "Canvas" of course). I'm really surprised that they worked without a Camera3D in 3.x.

Also, as a note, you really should not be using DoF and auto-exposure in 3D. You are sacrificing a lot of performance for effects that would look better and run way faster if done natively in 2D.

[zaevi]

This should be documented, at least marked in official HDR for 2D demo.

[clayjohn]

@zaevi There is already a draft PR! godotengine/godot-docs#6273 It should be finished and merged soon

[h0lley]

Closing, as all these effects are achievable in other (better) ways in 4.x as explained by clayjohn.

[KerekesDavid]

Sorry for posting on a closed issue, but I'm in the same situation where I want to use auto-exposure in my 2D game. You closed this issue saying the new workaround is better, but didn't clayjohn explicitly warn against using these effects with the 3D camera?

Also, as a note, you really should not be using DoF and auto-exposure in 3D. You are sacrificing a lot of performance for effects that would look better and run way faster if done natively in 2D.

Wouldn't it be reasonable for the camera attributes to work natively in the 2D camera as well? It might not be a regression per se, since it sounds like these worked by accident on the 2D camera before, but it's still a regression from a usability standpoint.