Is there a way to use the `PlayerLoop`

[ember geyser]

Note: I am aware of Application.onBeforeRender, but I want to run after it.

[neat solstice]

Have you tried all of them or just guessing by their name?

[ember geyser]

@neat solstice Tried all of what?

One other point of context: I am not working in a MonoBehaviour; ECS ComponentSystemGroup in this case, but the issue is not specific to ECS.

[neat solstice]

The subsystems in GetCurrentPlayerLoop that are around the area you want to insert your hook.

@ember geyser I'm pretty sure there is a XR subsystem that happens around before render, but maybe only if you have XR packages installed.

[ember geyser]

@neat solstice There are no subsystems returned from GetCurrentPlayerLoop that are around the area I want to insert into; that is my issue. GetCurrentPlayerLoop is only returning subsystems up until the point frame rate matching (red arrow in screenshot) would occur before rendering.

[neat solstice]

How have you confirmed that? I wouldn't know of a way to check that without trying each one.

[ember geyser]

When I couldn't find the necessary subsystem in the GetCurrentPlayerLoop return I dumped all of them and found that the before render, render, and post render subsystems are not there.

[neat solstice]

Well, there's clearly some subsystems in there that happen at the end of a frame, like Profiler.EndFrame and TriggerEndOfFrameCallbacks, so that must mean there's some point where it goes from before render to after render.
The subsystem I was thinking of was this was:
UnityEngine.PlayerLoop.PostLateUpdate+XRPostLateUpdate.
Have you tried this one?