Why I made this patch?

This patch aims to make Markarth Outskirts and SKY CITY - Markarth Rising compatible. In 2023, I believe both mods are the best combo to improve Markath. Together they add around 15 interior cells and 20 needed inconsequential NPCS. Markarth lost a significant part of its population after the completion of the forsworn's quest and the Namira's quest.  Until now, both were incompatibles because of clipping items, Navmesh, and landscape conflicts in some cells around Markarth's entrance.

I also recommend adding Balthazar Bookstore, and the Dibella's bathhouse to add more live to this city. Both mods are compatible with this combo.

1. Dibella's Bathhouse: https://www.nexusmods.com/skyrimspecialedition/mods/58072
2. Balthazar's bookstore: https://www.nexusmods.com/skyrimspecialedition/mods/53663

What I did?

I edited the problematic cells with TESVEDIT. I prioritized the Navmesh and the landscape edits of Markarth Outskirts, and I disabled clipping Items of the Sky City. 

The result is Markarth Outskirts less Sky City's unfinished and clipping items in exterior cells with Sky City's edits in Markarth City's cell.

Installation

1. Download 
2. Install the patch into your data folder manually or with your mod manager
3. For your load order, use loot or put the patch just under Sky City.
4. Endorse if everything is fine, it takes me around 4 hours to do the patch.

You can install or remove this patch during a game but use Fallrim tools to clean your save.

*** If you install this patch in the mid-game, you must disable a platform clipping with a house around the entrance with the console (disable).

Everything is fine with a new game.