First of all sorry for my english or grammatical error
I have just create a simple scene with some cubes ,which use to make a house and applied only diffuse texture ;created one sun in blender
texture are simple diffuse texture though it creates funny specular dot in the middle of mesh i have attached picture also link top my testing local server
http://linuxgame.ddns.net/speakout/
note: i have created those window cuts using boolean modifier but everymesh has ths tpe of specularity