Bk Realistic tracers

Realistic tracers swaps the vanilla tracer models for a thin, tapered streak that glows like tracers in real night footage.
Streak: each tracer draws the path its bullet flew in the last moment, so fast rounds leave long streaks that shorten as they slow down.
Shapes: three of them (tapered, slim, uneven burn), picked at random per shot so bursts don’t look copy-pasted.
Faction colours: US red, USSR green. Other factions use a colour you can set.
Real light: every 3rd tracer lights up its surroundings, with flicker and no shadows, and the light fades as the tracer climbs. Lights are capped, so long bursts stay cheap.
Coverage: works on all vanilla tracer rounds. Tracer rounds from other mods keep their own model but get the light.
Multiplayer: the server owner sets the values and every player uses them, so nobody can tune their own tracers for an advantage.