Custom models won't show up in game

[Statyk]

Copied from the common error thread:

Spoiler below!

The level editor is simply not loading any custom textures, particles, entities, static objects, billboards, etc. To fix, exit the level editor, BE CAREFUL NOT TO SAVE, and open the "resources.cfg" in your redist folder. Add this directory in there:
<Directory Path="/custom_stories" AddSubDirs="true" />

The Level Editor uses the directories in the resources.cfg to load assets. The custom_stories
folder directory is not in there by default, so you have to add it
manually if you have custom assets in your custom story folder. Save
your resources.cfg and open the map in Level Editor again. Everything should load and the error should not come up anymore.

(If you are trying to load an Isolated Full Conversion, simply add a directory to your IFC as well and it should work)