[With seemingly every movie studio relying on making extra bucks off 3-D technology, “Paranormal Activity: The Ghost Dimension” director Jason Blum tells SOHH why the franchise finale intentionally went with the big screen trend.]

The 3-D was part of telling the secrets. So it was a very organic leap.

When we decided “Paranormal Activity: The Ghost Dimension” was going to be the last movie and we were going to reveal everything, we decided a great way to do that was to be in 3-D.

So that way you could actually see the ghosts and we could show them to you in 3-D. This component was organically folded into the storytelling.

It was all very unique. We didn’t just slap the 3-D on there at the end of the process. The storytelling involved 3-D, that’s why it’s called “The Ghost Dimension.”

I thought it was a fun and unique way to use 3-D.

“Paranormal Activity: The Ghost Dimension” opens in theaters nationwide today (October 23).