I have a Panasonic PT-AE8000u that I'm setting up in my living room. Due to the room, it must be ceiling mounted. The PJ has a good amount of lens shift, but even with 100% lens shift, I'd still like the picture to be a few inches lower.
So I'm wondering just how bad it is for picture quality to use digital keystone correction (i.e. aim the projector lower and correct using keystone). I've heard that it is not ideal to use, but is that more of a theoretical thing where any sort of processing applied is by definition altering the image, or is it very significant and noticeable in use?