Photoshop is expensive. Period. It’s bloated, too.
But the The Gimp is just .. well, gimpy.
•No Adjustment Layers
This is huge. In order to get the same functionality you must DUPLICATE the base layer, apply the filter or adjustment, and repeat until your comp is done, otherwise there is no going back. This is a big memory waster that is easy to make an irreparable mistake with.
•No 16-bit support
I suppose the lack of adjustment layers isn’t that big a deal without 16- and 32-bit support, at least it’s not going to be as inefficient. So I guess utilizing 1/256 the data is worth it? Oh well. Shadow and Hilight detail isn’t THAT important, right?
•No CMY*K
Separations? Really? Your prepress guy is going to LOVE that. No way to trap. No way to isolate K. No way to control black generation. No way to do much of anything of value until you load it back into Photoshop!
I can 100% guarantee you, that if you fancy yourself a graphic artist and you deliver a .zip containing four greyscale images of a logo without trap or isolation you’ll do nothing but provide lots of laughs from the printer. In fact, submitting such a file is no better than an RGB. At least an RGB won’t need to be recomposed.
So sure, I guess the GIMP is good for lightening the mood for your over stressed prepress department, I can hear the banter now, but you’re going to look very unprofessional. It will cost you more. And when they are asked who they would recommend for a graphic artist, it will not be you.
•Awkward color management
Color management is there… kind of.
•Limited Hue/Sat adjustment
This is the tool I use the most for making the hardest corrections happen. Noise reduction, chromatic aberration, selective color adjustment, vibrancy… but with gimp I’m stuck with only 6 colors to choose from with no feather, just a gimpy “overlap”. This makes hue/sat pretty useless. Sure, you could build a mask, duplicate the layer, apply the hue/sat adjustment, but I’d like to see Photoshop’s Hue/Sat tool improved! Using The Gimp’s hue/sat is just far too limiting.
Why is the gimp so terrible, yet other (unrelated) GPL software so great? It might be in The GIMP users themselves. GIMP is hailed as such a perfect platform, there seems to be little room for improvement. However, the above features are not minor ones, and are used by photographers and/or graphic artists on a daily basis. GIMP users are so busy pointing out how great the GIMP is, that it can do so much that Photoshop can, that there is very little talk about the significant features that it’s lacking.
You don’t see the Blender community saying that Blender can do everything XSI or Maya can do. Because it can’t, and they are not so delusional to think it can. Instead they focus on improving the package so that it can perform rather than inflating on what Blender is already good at.
People who advocate the GIMP clearly are either in denial, or don’t understand the value of things like Adjustment Layers and 16- and 32-bit imaging or native CMYK and LAB.
There certainly are many, many bells and whistles that are compared to Photoshop, and compared to Photoshop LOUDLY. But, it’s not the bloat that I’m interested in, it’s the functionality.