Thanks for this. I've got the script working in a limited fashion, but only the ambient light effect is playing. The bolt itself is not visible, and there is no audio played either. I realize this is an old script, but I can't find anything more recent, nor am I remotely skilled enough to make one from scratch. When you use it, does the audio play as well?
Edit: I've been able to get the effects to play, but have encountered a new problem. What is the maximum radius the lightning can spawn in? I've updated line 61 to a 2500m radius, and placed this into the init.sqf:
_nul = ["lightningCenter", 2500] execVM "scripts\SHPambientLightning.sqf";