I try this tip with thé Cessna 172 of FSX and i succed for the first try.
On my Cessna 152 which use more animations on the VC ... Not at all but glass texture use an alpha channel so it is possible what the two conditions are in opposition.
Thanks for the reply Pyscen. I actually kinf of took the script from the SDK examples. I am attaching it. I dont know if the P3D is expecting another language. This is lua but I dont know hoe the Ground Poly wizard is exporting the bgl.