[Blender] Importing to HPL2

[Mudbill]

The *.ent file is your entity. You can't use it for anything but a static object without an entity file.
Also make sure that when you're using your entities, you need to place them in the Amnesia/entities/whatever location instead of Amnesia/custom_stories/yourstory/entities/whatever. The level editor uses files from that location so to use entities in it, they must be stored there.