One of the strangest Blu Ray releases, I was so annoyed when I first got it and saw how waxy everything looked, but luckily theres an extra that lets you add film grain, yet theres still less detail than the original Koch disc..
An extra that lets you add film grain???
The film grain isn't an extra that is activated or not, what the disc does feature is 2 different transfers of the film, one with major DNR applied (which made it have an annoying "waxy" look, killing pretty much all detail on display) and another transfer, unfiltered, one with the film grain intact, which looks pretty good (I don't know what setup you used, but there's no way this second version has less detail than the Koch DVD; I didn't compare them side by side, but I own both, and this second version on the BD is easily superior to the transfer on the DVD).