Is there any efficient script to control the FPS controller, i have tried many but it feels some glitch and lags specially when running!
i hope i can get a clear simple enough script without having to download assets because you get somehow confused.
Off the top of my head, you want to grab the horizontal (generally a, d) and vertical (w, s) inputs and then transform your camera based on that. The transform would probably look something like this (pseudocode):