Ok, this is more a minirant than a comment.

fft3dfilter is awesome. I probably couldn't live without it. Still comparisons of before and after show it really does its thing for removing noise.

What I don't understand about it is that in motion it makes it look like the camera lens is dirty. Besides softening the picture, you get a soft pattern that looks a bit like film grain but doesn't change pattern from frame to frame.

I'm not sure I can explain it better. It's a strange artifact, but I've seen it time and time again. Does anyone know what I'm talking about?