I am using Instanced static mesh for civilian vehicle ->the system is like one actor holds multiple instanced static mesh component with multiple instance of each issue is Currently i am using TSR for AntiAlising if i switch to FXAA. instance mesh are clear and ghosting is resolved but it causes overall scene to flicker. so any work around for this. would be helpfull.
Sounds like the way ISM updates the positions of its instances does not get reflected in the velocity buffer needed for temporal AA. Have a look at this: [UE 5.0] Ghosting Issues with Instanced Static Meshes and TSR/Temporal AA
You could look into how you are updating your instance transforms and whether that is designed to work with TSR.