I assume you have imported a model of some sort? You might look at it from the top it may have no depth to it and therefore not showing you the effect you apply to it right. While in the topview try adding some depth to it and see if that fixes it. Also if its multiple parts you might try ungrouping them and applying the textures seperately. I have had a hard time with windows myself (glass effect). What do you mean by doesn't appear correctly? What exactly is wrong with it? If you can give me a little more info I might be able to fix it for you.