Simply cannot export compatible models from Blender 2.74

[Spelos]

Ok, so the message that appears is:
FATAL ERROR: Created material 'C:/Program Files (x86)/Steam/steamapps/common/Amnesia The Dark Descent/entities/folder/model/' could not be loaded!


I think it is safe to assume that there's something wrong with your texture/material.
Common mistakes in this category are:
- More than one texture or none applied.
- Texture is in weird format (I use .tga for all of my textures)
- Texture is not included with the model in Amnesia dir
- Texture has weird dimensions (I use 1024x1024 or 2048x2048, 512x512 migt do as well... To be safe make sure your texture is divisible by 2)

What you can do to provide more information for diagnostics:
- Where does the error happen? In level editor? Model View? In Game?
- Make a screenshot of the files you are exporting
- Make a screenshot of the Blender environment with the model

Your best bet would be to make sure you haven't done any of the common mistakes mentioned above. If you problem is still happening, send more information.