Trailing wingtip vortices/vortex - not visible in any weather conditions

[DrShadow]

Hi all

I noticed that i dont have trailing wingtip vortices on my A340.

Yes, performance mode is off 🙂

 

Nearly in all my fligts (real ones) with 330 and 340 i could see the characteristic white wingtip vortex during take off and approach. 

I tried preset weatherconditions, like very dump or humid air, rain, aso. Also heavy aircraft, but they re not visible.

Is there a trick that the arise?

Cheers Pascal 

Edited November 28 by DrShadow