I've just taken the small arms tracers, scaled them up 2x, and then
saved over the old large calibre tracers.
This works a lot better and looks a lot nicer than the old large calibre
tracers.
They use the same rvmats and textures as the small arms tracers, so the
old files for large calibre tracers can be removed.
- allows ACE tracers to function properly at night
- all tracer rvmat's values have been changed to be closer or the same
as vanilla tracer rvmat values for the same tracer colour
- ace_shell_tracer_red is now a copy of ace_shell_tracer_yellow, but
using the red texture and rvmat.
This is because it had a completely different model then the other
ace_shell_tracer_xx models that was large, fuzzy, and translucent. it
made red tank tracers look like a big red cloud flying through the air.
* the new values for the rvmat's aren't perfect, but they work I will
probably tweak and test a little more
