Texture maps (diffuse, normal, specular, opacity)

This image represents a breakdown of my parents' house and it features the most important textures used in different situations for improving the quality of the final rendering. It's about diffuse, normal, specular and opacity maps which was created in Photoshop and Crazybump.

I just created the diffuse map firstly and then from this point I used a program to obtain the other maps, so from the modeling side I created a low poly model and then I applied all textures. I didn't modeled a high poly version of the house because I didn't have enough time and I assumed that it's a good start to create a normal map based on the diffuse texture in Crazybump.