I noticed a few days ago that all my AI aircrafts have lost their contrails. I cannot tell you if this problem was there for a long time, but I noticed it only last week.

My configuration is : FSX SP2 + AS2012 SP2 for weather aloft + UT2 for AI.

What I already did is the following :

I verified that the fx_contrail_l.fx and fx_contrail_s.fx files in the Effects folder are the original ones.

I verified also that fx_1.bmp and fx_smoke.bmp textures are the original ones.

I tried to change the contrail length in UT2

I verified that the temperature where AI airplanes are flying is less than -30C

And up to now, the contrails remain non-existent.

Does anybody have other ideas to recover the contrails ?

Thanks for your answers.

 

Alain

 

 

No ideas, anybody ?

1. Maybe the temperature at the altitude (FL250 and above) is not below -30.

2. Maybe the contrail effect file is broken.

3. Maybe the texture is missing/broken.

Maybe the aircraft.cfg entry calling for the effects has been deleted, but I highly doubt that, because I wouldn't know why that would happen to all aircraft all out of a sudden.

For information of the readers of this thread, I found that the problem is connected to AS2012.

I tried to load FSX with FSX-Jeppesen standard weather, and the contrails were back ! I loaded then AS2012, and at the instant FSX connects with AS2012, pops ! the AI airplanes stop emitting contrails.

I suspect this has something to do with the atmospheric temperature at altitude.

I submit a ticket to HifiSim to try to correct this minor, but annoying problem.

Thanks for reading !

 

Alain