Created attachment 102656 [details] upscaled 200% downscaled back by %50, supposed to be box but isn't Box scaling works when up-scaling but not down-scaling. The attached example shows an image that has been up-scaled to 200%, duplicated, and down-scaled to 50%. The down-scaled rendition shows no resemblance to nearest neighbor.
Can you also attach the original image, so we can try to reproduce?
It happens with any image and any file type. I'm using the portable 64 bit Windows version.
http://www.imagemagick.org/Usage/filter/#point says you want the 'Point' "filter" instead of a 'Box' filter, but I am not sure if Krita offers it.
No, Krita doesn't have a point filter. We're also not really planning on adding one, but we can register it as a wish.
Is there a known workaround in case we need a nearest neighbor or point filter? Such a filter is nice for reducing pixel art.
Implemented/fixed in Krita 4.2.0 under the name "Nearest Neighbour".