Chromaniac
Well-known member
set it to 350. upload a few test images. see the thumbnails generated. if happy, rebuild. tbh, i am not sure if there is any other option at the moment. xenforo resizing seems to be pretty decent for full sized version. thumbnails are not that high quality. but that makes sense to be honest, they are only supposed to give a preview of the full image and keeping them high quality does not help because it increases the loading time while still giving a small preview of the original image.