BIG SPOILER ALERT-
Build up to absolutely nothing it's called the red door when I only saw it once and no I do not count the paintings.
It was scary just a bit of a let down it didn't build up to somthing more, for when the movie did start to build up it ended.
would of liked to see more of the further instead of only 20 minutes of it.
Lots of new mysterious that were never went back to.
Overall, i believe it was a serious let down to the insidious movies and expected way more from.the ending.