Tips: Register BSAs
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When a mod comes with a .bsa
file (such as Tamriel Rebuilt), it needs to be 'activated' or else the game will exhibit unwanted behavior (such as the "yellow exclamation points" often seen.)
The easiest way to do this is to use OpenMW-Launcher:
- Run OpenMW-Launcher
- Click the "Data Files" icon at the top
- Click the "Archive Files" tab
- New
bsa
files will be highlighted in green, check the box next to them - Reorder as needed

This can also be done by directly editing openmw.cfg
(only recommended if you know you really want to do it this way), like so:
fallback-archive=Morrowind.bsa
fallback-archive=Tribunal.bsa
fallback-archive=Bloodmoon.bsa
fallback-archive=PC_Data.bsa
fallback-archive=TR_Data.bsa
fallback-archive=Sky_Data.bsa
Above is what your "bsa section" would look like if you used every mod in the recommended list, and ordering matters. But that's all there is to it, "registering BSAs" just boils down to adding a line to your config file.
If you start OpenMW with a BSA registered that does not exist, there will be an error telling you about it and the game will not start.
Performance Custom Shaders Custom Groundcover Portable Install Navmeshtool Merging Objects Cleaning Plugins File Renames Atlased Meshes INI Importer OPENMW_PHYSICS_FPS