I can manipulate the passing of "game" time quite easily using the TimeScale global, what I can't do is make any active effects or summons decrement their durations.

I can't use the FastTravel() function because that would put players through multiple loadscreens (if it even works from interiors) and using a fixed location would be very far from ideal too.

Is there any other way of making "real" game time pass?

SlowTime greater than 1?

It's not very reliable in terms of precision timing, but giving it a value greater than 1 causes the Game World to speed up accordingly; not been able to test specifically on Spell-Effect duration, but Load Doors for example have to play their animation before they trigger loading, so it might work.

Edit : Just tried with the Talos Shrine in Whiterun--doesn't work, unfortunately. The Game World speeds up, but the Spell duration itself remains real-world time :/

Bonus Tip : Slow Time, Positive 100, is the stuff of nightmares... NPCs flying everywhere, becoming long strings of twisted flesh... ::Shudder::

Edit 2: What about forcing a Wait? Use Input.TapKey() to open the Wait Menu, set it to the hours, and then wait? Not elegant, but...

Stuff of nightmares you say? Dammmmmn I think I can actually use that for something else.

Please excuse me whilst I cackle maniacally

Really appreciate the suggestion. I was kinda hoping this might have been the sort of obstacle the collective modding hivemind might have been able to subvert by now

I noticed SKSE has GetDuration(), but no SetDuration() ? bother. Fortunately it's not a super big deal, just slightly immersion breaking when the player recovers from a 3-12h blackout but their 30s duration summon is still next to them

Maybe I will have to get creative with FastTravel()..... but I would need to operate under the assumption that no markers are revealed.

Can I place map markers at runtime using quest alias'? Just thinking out loud here... This is getting complicated fast because I usually want to move to an interior.

Edit (in response to your edit):

Hmm, forcing a wait would kinda be like cutting off my nose to spite my face. I would gain +2 immersion for temporary effects expiring but would also get -10 from the forced wait menu.

I'm also disabling player controls so I can use that cool wake up animation from the Abandoned Shack when you meet Astrid for the first time. So yeah forcing input could be....jarring.

I might revisit creative applications of FastTravel() as I get nearer to completion.

Why not see if you can circumvent the forced-wait dialog showing somehow, by "blacking out" the screen maybe?, then using the cool waking thing from the shack?

Menu's show over fade out / imagespace modifiers even dialogue too lol.

Debug.ToggleMenus()?

Never used it, but it's listed on the Wiki as a command--combine it with Serethil's suggestion, and it might look quite good? Looks like the first call will hide them, second call will reveal (so, same as TM in the Console).

Wow. That svcks.... Goes to show I know almost nothing about CK though!

Thank you both, that sounds very promising. It's been bumped down the list but when I get around to trying it out I'll post back here.