I'm trying to convolve one set of color volumes with another and can't seem to get the settings right to give me sane results… I can't seem to get the inverse FFT results to not be transformed to the corners. Any tips?

So now I'm getting the result back into the original position, convolved, but the value scale is way off. I suspect it's because I need complex multiplication and not just a volume mix/multiply? Is there a way to do this while not using python/C++?

EDIT: found a way here… should have been obvious.
http://odforce.net/wiki/doku.php?id=wikicomplex.h&s [odforce.net]=complex

Also, I'd forgotten that blur kernel volumes need to be normalized to sum to 1.