Updating a replicated variable from client to server

[BenWesty90]

I’m sure this is simple and I apologise in advance. I’m very new to all this and I’ve spent hours fiddling, googling, and asking ChatGPT and I still can’t get my head around it.

So I’ve got a directional light blueprint called BP_Sun. I increase pitch by 0.1 every tick and have it replicated so all clients get a nice day night cycle. Easy stuff!

Now I want players to be able to increase and decrease the speed of the day night cycle. So I swap that 0.1 out for a replicated variable called SunSpeed and make it editable, then get a reference to it in my player character.

Now in my player character blueprint, when the character interacts with a particular button, the SunSpeed should go up or down. Unfortunately, I can only get it working when the server client(listen server?) interacts with it. When a standard client interacts with it, a print string shows that the SunSpeed updates inside the player character blueprint, but does not update inside the BP_Sun blueprint.

I’ve tried every variation of “Run on Server” “Run on Owning Client” and “Multicast” with the custom events, and it doen’t work.

I am clearly missing something. Could anyone point me in the right direction?

Thanks!

[Auran131 (Auran13)]

RunOnServer is the correct one with the sun speed being on RepNotify BUT you need ownership to call RunOnServer so you may need to call the function from your PlayerController

[BenWesty90]

This worked! Thank you! I am still not sure if I understand ownership. I assumed if the client has ownership of the PlayerController, then it also has ownership of the Pawn?

[Auran131 (Auran13)]

usually yes, you can set owner on spawn but its probably best to assume the server owns everything except controller and pawn, playerstate too i think, basically the player should own what it wants to directly control