How Should I Go About Making Realistically Fast Bullets?

[tomcat]

@wigglyanemone35

B: Really Really fast projectile, long collision box to make up for it

In this case, the “collision box” must be very, very long.

Characterbody3d falling through floor under specific circumstances related to falling.

This option is the closest. Very briefly — the game physics engine is deterministic and does not always have time to process collisions if objects move quickly. Example — a bullet flies through glass. In one physical frame it is in front of the glass, in the next — behind it. The glass remains intact, which is impossible in reality. That’s why in such a case you need to use a beam (raycasts), not a physical body. Therefore, the realization of real physics in the game engine is not a very good …

And also, in real life, bullets fly in an arc.