Implement a method in RenderingServer to change the rendering pipelines.

[RadiantUwU]

Describe the project you are working on

Raytracing plugin implementation

Describe the problem or limitation you are having in your project

Being completely unable to change the pipeline without editing the game engine itself.

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

This would allow the modification of the 3D rendering pipeline to allow to implement raytracing, path tracing, maybe even voxel based rendering.

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

void RenderingServer.change_rendering_pipeline(int idx, RID pipeline)

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

No.

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

This requires modification to the game engine.

[AThousandShips]

What is the index here? Which pipeline is being replaced?

[RadiantUwU]

What is the index here? Which pipeline is being replaced?

The fragment/light pipelines.

[AThousandShips]

Those aren't indexed in ant way I know, please elaborate

[Calinou]

Thanks for the proposal! Consolidating in #4287 and #7916.

Regarding raytracing support, it's planned to expose raytracing extensions (Vulkan raytracing/DXR) at some point in RenderingDevice. See also #5162.