I need a structure unit which uses a turret to cast a certain Effect-Target Ability, but when ordered to do so it won't turn the turret to point at the target, thus not firing the ability at all.
Point being I need to somehow be able to give the turret this ability which doesn't seem to be possible with the actual editor, so is there any way to have something similar or a nice enough work-around? like making the turret be an actual unit?
Is there any particular reason why it has to use a turret with an Ability? You could launch the effect with a weapon just as well, or set the casting arc to 360° (currently bugged to default back to 0 if you manually type "360", copy-paste from Mothership abilities)
Casting arc is on the ability (field also exists for weapons) and if set to 360° will allow the unit to cast without turning at all, as is required for structures like the Nexus and Orbital Command. The unit won't attempt to turn and thus have no visual effect unless you dummy it in. The same result can be achieved for weapons by mounting them on a Freely Rotating turret like on the Mothership.
DrSuperEvil's simulation system allows you to make part of the unit visually rotate towards the target and you should definitely use that if you care about the visuals.