Sorry for spamming but I cannot edit my own posts apparently. I cannot get rid of the problem. It seems to have to do with the Skyrim.ini as these sources suggest: https://wiki.step-project.com/Guide:Skyrim_INI/Display#bShowMarkers https://www.reddit.com/r/CreationKit/comments/4e72n3/heres_how_you_display_ck_markers_in_game/ https://www.reddit.com/r/skyrimmods/comments/4wy8mb/strange_colored_geometry_after_following_step/ https://forum.step-project.com/topic/11183-various-solid-colored-blocks-and-shapes-in-textures-after-applying-step-core/?hl=%2Bbshowmarkers&do=findComment&comment=178682 Some people could solve the problem by changing the value of bShowMarkers from 1 to 0. But in my case this did not work out as "bShowMarkers" was not added under [Display] (or any other header) in my Skyrim.Ini file. I deleted BethIni and all caches and hopefully all remains. I deleted Skyrim.ini and skyrimprefs.ini and started the game from launcher. The problem still persists although the Skyrim.ini file should be clean, right? I even added bShowMarkers to the ini.file. Still the problem persists. When deleting the ini files and starting the game from Steam the problem is gone. When starting from Mod organizer it`s back. Help would be highly appreciated!!