I discovered something interesting while messing with the Rules.ini and Firestrm.ini, some weapons and warheads have the "Bright=true or Bright=yes" for some reason with these on it causes ingame lag on modern day computers, a good example is when u destroy a laser fence post with a large laser fencing section it creates a whole lot of lag and it could get annoying to prevent this, simply set "Bright=false or Bright=no" to all weapons and warheads and it stops a lots of lag, though it may prevent some lag when u destroy something, it does not stop all the lag issues with the game on modern computers, i just thought this might be helpful.