Yesterday night, we published a comprehensive update to 777 Immersion. In addition to P3Dv4 support, we also revamped the volumetric lighting for the landing lights, taxi lights and runway turnoffs. This update has been rolled out for FSX, FSX:SE and older versions of Prepar3D free of charge to existing customers. Prepar3D v4 users are not required to have Dynamic Lighting enabled to see volumetric lighting effects. See the result in screenshots below!
To update 777 Immersion, simply go in VFXCentral and press DIRECT INSTALL or MODIFY/UNINSTALL to enable the effects in P3Dv4.