Question: must have addons for fsx?
Answer: FSX users. SimConnect (FSX:SE users only) – free. ...  Prepar3d users. FSUIPC (all users) – free. Read more. Read more about the first steps in upgrading your FSX. ...  Weather engine. ...  Cloud and sky textures. ...  Moon. ...  FSX / P3D. ...  Freeware ground textures.