Okay, I've been using Krita for quite a while now to make tilesets for RPG Maker, and I've been thinking about doing a 3d game, which I can do using a plugin for RPG Maker MV (the mv3d plugin is awesome), the issue is that the tile size is 48x48, but I'd like to make something low-rez, reminiscent of retro games. I can't change the tile size in RPG Maker, and nor can I use the 3d plugin in a previous incarnation of RPG Maker because previous versions run on the Ruby language and MV (and thus the plugin) uses Javascript. So I can't use the XP version that has the 16x16 tile size natively if I want to use the plugin. I came to the obvious conclusion: draw my tileset in 16x16, and resize it to 48x48. exactly triple the size.

It sounds easy, and it should be, but, in an experiment I drew a small sprite and resized it.... and the result was just awful, like, extreme anti-aliasing everywhere on the image. To slightly resize bigger images this is probably not a problem, but for pixel art which is very small, it's a truly awful feature. Anti-aliased pixel art looks very blurry, and one thing this art form shouldn't be is blurred, especially for game art. Do I need to do the resizing in a retro version of MS paint or something, or is there a possibility of turning the anti-aliasing off and have each individual pixel become a square of nine pixels (which is what I want, so that the pixels are visible?

In case it's important, my work is all saved as PNG images, which is the import format for tilesets.

Oh, I found the answer already, changed the settings of the transform tool to nearest neighbour instead of bicubic. Actually it was something someone mentioned on a reddit post about Gimp, and I figured Krita may have the same settings... it does, and I changed it, it works