Quote Originally Posted by gray eagle View Post
The vapor cone effect entry ^ isn't working for me in P3D V4.5

The sonic boom works great.

Has the light entry the consecutive number ?
In this case

light.9 = 10, -10.00, 0.00, 0.00, fx_RCB_machenvlop,1 // SonicBoom effect

and have you the "fx_RCB_machenvlop.fx" file in your effects Folder ?