[rossmum]

The only reason they should appear as wobbly lines - for both the tracer itself and the smoke trail - is if the viewpoint (guncam, external camera, whatever) is shaking a lot. From a still or relatively motionless viewpoint, the only thing you'll see is the arc as the round is pulled down by gravity or its change in direction if it ricochets or is blown off-course. Bullets spin, but you're not going to see a visibly gyrating trail of either tracer or smoke because the whole reason they spin is to make them fly straight.

This is why I've never installed any of the wobbly smoke trail mods... the only time they make much sense is if you're recording a movie and you then apply a gratituous amount of screen shake.

Now if someone made a mod in which your whole AC shuddered while firing its guns, and the tracers appeared as squiggly from inside but straight from outside... THAT would make sense. As far as I know though, it may not even be possible.