If anyone here remembers how colour scans for printed media look like super up close, it kinda looks like that. NOW! Glaze and Nightshade as standalone apps are very GPU heavy it's gonna take some time to render stuff out. 3d artists who do beauty renders are gonna know what that's like.

If you are doing one of those composite crop edits of your work or a thing for portfolio day, make a web-sized version of what you plan to post and then Glaze that instead of each piece one by one. Nightshade and Glaze is only for images you post online, not stuff sent to print. Remember that.