I had a problem with the textures I used for the windows of my model. Every time I saved the level and then went back to it the window texture had returned to the default. I'm not sure why. These are the settings I used:

LIGHTING SETTINGS

Diffuse Colour: 190,252,252
Spectral Colour:132,207,236
Glossiness:29
Specular Level 1
Emmissive Colour: 250,250,250


TEXTURE MAPS

Diffuse: textures/autotest/road_ground_stoneb_brighter.dds
Bumpmap: textures/defaults/glasstint.dds

SHADER GENERATION PARAMS

-Refraction Map