FREE WEATHER ENGINE GO GET IT! http://ticket-system.org/efasswiki/index.php/Ultra-WX_Weather_Engine FeaturesFramerate Friendly (mostly the Framerate even gets better than with XSquawkbox/X-Ivap weather)Cloud SimulationSurface Wind SimulationUpper-Winds SimulationWind SmoothingCloud Coverage ControlPrecipation SimulationTemperature/Dewpoint SimulationPressurization SimulationAnti-Lag Update intervals configurableWorks brilliant with Clound Enhancement plugins like SkyMaxxWorks with 32 and 36 BitInstallationMake sure to use EFASS in single PC Mode. UltraWX will not work on Multi-PC setups! Close X-Plane Open the EFASS-Settings Click the UltraWX tab Click Install XPSM Plugin and select your main X-Plane installation directory (Example: D:\X-Plane). Follow the instructions. Tick the Enable UltraWX checkbox and click Save Run X-Plane (as administrator!) Disable all other Weather Plugins and X-Plane's native Real-WX auto update (on X-Ivap click System->Preferences and turn IVAO WX to OFF!)CustomizationWind-Smoothing: Move the slider more to the right to get more smoothing. The more smoothing you have, the slower wind transition will be performed. Moving the slider full to the right is recommended. Example: You fly from an area with winds from 270°/5kt into an area with winds from 090°/40kt. With Wind-Smoothing, winds will turn slowly, so that your autopilot will have enough time to react on this weather change. Without Wind-Smoothing, winds will change nearly immediately and this may result in structural damage on your aircraft.Cruise-Update Frequency: This slider sets the interval on how often UltraWX will gather new weather data during your cruise flight. Due to the fact that X-Plane has short lags/freezes during cloud updates, it is recommended to leave this slider in the default position (Update every 15 minutes). Moving it more to the left, will increase the interval of updates which might end up in many short stutters of your simulator.Cloud-Coverage: This slider affects the cloud density. If you experience Frame-Drops, move this slider more to the left. In some situations you won't see an effect immediately.Airport-Lock-Distance: This slider sets the distance to your origin and destination airport (in case that a flightplan was filed), where UltraWX should load the linked METAR. This prevents having lags/freezes/stutters during departure or landing. Note: In case that the METAR of the desired airport changes, the WX will be updated immediately, even if it is locked.Challenging Weather Factor: This slider defines the intensity of turbulences and windshear. Attention: Some Addon-Aircrafts react very sensitive on this value. Tuning this slider too far to the right might result in a structural damage of your aircraft in some weather situations.Ground-Lock Altitude: (in meters!) Below this altitude, UltraWX will not allow any weather changes. Only applicable if Lock weather on ground is checked.Reload on Taxi-Out: This will force UltraWX to make a weather update when your flightstage changes to Taxi-Out. This is useful, if you make many flights without restarting EFASS, so that locked weather will be updated. Unfortunately, this will produce a short lag of X-Plane when starting your taxi.Look and feelUltraWX changes X-Plane weather to the real world weather, but not the look of the clouds or something like that. To tweak the look and feel, we recommend using the following addons The FlyByLua based Haze plugin (Freeware, this does not affect your framerate, it just changes some art control settings to make it look much nicer - especially in higher altitudes) Just copy the folder from the ZIP to your <X-Plane>\Ressources\plugins directory. If you previously installed FlyByLua, just copy the files from the scripts folder. SkyMAXX Pro (this is payware but a very nice addition with many settings)Framerate tuningWell, that's hard, because there are too many aspects that can infuence your FPS. UltraWX will not touch your frames, because it has an intelligent algorythm to free non required ressources. Refer to the forum to get tips, by posting what addons (Scenery, aircraft, textures,....) you are using.