Wing Vapour Effects Realism

Hi guys.I have various vapour effects on my aircraft and have them turned on with G force magnitude. Of course, everytime the G value exceeds a certain value, they show up. I was wondering if the effects could also be controlled using other variables as well which may make their appearance more realistic. I was thinking of air temperature, for example. Would dew point also be a factor, and is there a way of simulting this.Many thanks,Nick.