Add support for motion blur

[josefkaragoli]

Describe the project you are working on

3D project

Describe the problem or limitation you are having in your project

Godot doesn't support TAA or any other temporal effects so quick motion of objects looks unrealistic and too fast.

Describe the feature / enhancement and how it helps to overcome the problem or limitation

Motion blur would alleviate this by giving a more realistic and predictable look when objects move fast

Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams

This could be added in the WorldEnvironment but more logically the new CameraEffects resource in a Camera.

If this enhancement will not be used often, can it be worked around with a few lines of script?

There is a shader for motion blur https://github.com/Bauxitedev/godot-motion-blur but it doesn't take into account moving objects, only the movement of the camera.

Is there a reason why this should be core and not an add-on in the asset library?

it is core

[Zireael07]

I thought I'd made such a proposal, but apparently not. Seconding.

[josefkaragoli]

I thought I'd made such a proposal, but apparently not. Seconding.

Yes I also thought I'd seen a proposal for this but couldn't find one

Is Godot 4.0 meant to be feature-complete by now? If so then I think this will probably be implemented in 4.1 since temporal stuff doesn't really work well in a forward renderer

[mrjustaguy]

Feature Complete only when it gets to Beta, still in pre alpha stage..
Personally however, I think Godot 4 is IN the Alpha stage, just hasn't been made official.. I mean The level of stability/bugs present in master is roughly at the level of 3.2 alpha in my experience

[Calinou]

Per-object motion blur requires the rendering backend to expose motion vectors, which is not planned for 4.0 but for a future 4.x release.

[josefkaragoli]

TAA and motion vectors are now available

[Calinou]

TAA and motion vectors are now available

Indeed, but I don't think motion blur will be implemented in 4.0 unless a contributor steps up to do the required work. It's more likely to happen in a future 4.x release.

[Lauson1ex]

TAA and motion vectors are now available

Indeed, but I don't think motion blur will be implemented in 4.0 unless a contributor steps up to do the required work. It's more likely to happen in a future 4.x release.

Additionally, current motion vectors implementation is incomplete: no motion vectors for skinned meshes and blend shapes, which defeats the purpose of per-object motion blur.