# Multiple addon sceneries, priorities and the "double runway" effect **URL:** https://forum.navigraph.com/t/multiple-addon-sceneries-priorities-and-the-double-runway-effect/2357 **Category:** Airport Scenery **Tags:** double-runways **Created:** [December 15, 2020, 2:26pm UTC](https://forum.navigraph.com/t/multiple-addon-sceneries-priorities-and-the-double-runway-effect/2357 "2020-12-15T14:26:11Z") **Posts on this page:** 1 **Showing post:** 30
### Author: ![NAVData](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.navigraph.com/navdata/32/30549_2.png) [@NAVData](https://forum.navigraph.com/u/NAVData) #### Post date: [December 28, 2020, 3:11pm UTC](https://forum.navigraph.com/t/multiple-addon-sceneries-priorities-and-the-double-runway-effect/2357/30 "2020-12-28T15:11:40Z")
We try to help, when this is not welcome, no problem for me because all of this analyzes and testings are extremely time-consuming and I do nothing for myself - we do it for the community. When you don´t add these “DeleteAirport” and someone else creates also the same airport you have the “double scenery” view. That´s exactly the case here. We “create” these missing airport in the navdata-cycle (only the runway, nav points and procedures). Our package is very low and we disable the stock data completely. All addon-sceneries are higher in the priority as our data but when you don´t add these “DeleteAirport” you see the runways from our package and also from your package. > [@HowTo - Recommandation for Addon Scenery Designer](https://forum.navigraph.com/t/howto-recommandation-for-addon-scenery-designer/3063): > > This “HowTo” is a short guideline, what addon-designer should be consider, when they want to use the underlying navdata (default ones or from some other provider). You should try to split your scenery from the navdata. The reason for that is, that whenever something changed in the navdata, you must also update your scenery on-time not be outdated (and also your user must update his scenery file). To include terminal-waypoints, terminal-procedures, … is a more or less bad design and should be … Richard --- _[View the full topic](https://forum.navigraph.com/t/multiple-addon-sceneries-priorities-and-the-double-runway-effect/2357)._