 
 Here's the result:
It was rendered in directlighting, I guess that's why it gets so dark inside the house.
 
 
 
  For the paint, I used boolean modifier (cookiecutter type mesh on a separate layer) and other stuff was pretty much animating visibility and some oldschool keyframing.
 For the paint, I used boolean modifier (cookiecutter type mesh on a separate layer) and other stuff was pretty much animating visibility and some oldschool keyframing.