In my experience all that's needed is an invisible projectile to (almost completely) ensure hits. That's the value of the Direct Draw weapon effects like lasers and rad beams, that you can draw something to show the weapon's path without potentially sacrificing accuracy like you would when using a SHP or VXL based projectile. The DDraw stuff doesn't improve accuracy, though I can see why it might look like it does... since you can actually see what's shooting what
