Which scaling plugin should I invest in for Photoshop CS6+?
I need to scale an image up quite a bit and would like better results than the normal resampling... I remember a few years back in these situations I would use AlienSkin BlowUp at a place I worked at and it was pretty good.
As there are a few plugins out there, I was wondering which are the better ones to invest in nowadays?
I have tried all of them and I use them every day. I can say for sure the best is Benvista Photozoom, but you have to learn how to use it. For the best results in the negative scans I work on generally I use the (fairly obscure and hidden but unmatchable in terms of natural effect of resizing) "BSPLINE" algorithm with careful settings dependent on the image, and then I do some post sharpening in photoshop, by whatever means.
Photoshop's algorithms most often produce artifacts and the other Photozoom default options are very harsh but in some circumstances can be very useful. You really need to have in mind your output resolution and how it will look on paper and that comes with experience.