How to smooth projectiles on client?

Development Programming & Scripting Blueprint
1

Hello! What is the best practice to smooth projectiles in a multiplayer game?

I thought of:

  1. Spawn Server Projectile without Movement Replication
  2. Tick-> Interpolate the Transform to the Client to smooth it out
    Problem: on lag the spawn of the projectile would be delayed and movement could be weird with an interpolate if the lag is too big

or:
Projectile has no replication set

  1. Spawn Client Projectile for immediate visibility
  2. Multicast Spawn Projectile, exclude Client.
    Problem: Hit detection would be separated and for some reason the trajectory is very different on Client and Server

or this one that i can’t get working:
Projectile is replicated

  1. Spawn Client Projectile for visuals
  2. Spawn Server Projectile (for everybody else)
  3. Disable visibility of Server Projectile for Client (how do i disable visibility for the server projectile? )
  4. Interp Server and Client Transform until it is almost equal, then stop ticking and let ProjectileMovementComponent do it’s trick (how to RPC down to the clients Projectile?)

Thanks for help!

2

Check out the ShooterGame example.
There is some grenade launcher with a vest practices implementation