Glass objects keep rendering like mirrors

As I’m a Twilight user thought I’d take a quick look at your door model. I agree with whiterabbit’s comments and would like to add a few more. It appears that the glass in the door is just a single face. Make sure in Twilights Material Templates you use one of the “Architectural Glass” templates, they are meant to be used when your glass is a single face. Also Twilight has a known issue if an object has multiple nested groups/components ( more than 5 or 6 ) . I lost count how many groups I had to bore down into to get to the glass. You could possibly have some unexpected results with rendering this door due to that.