Say a development team includes (or makes use of) graphic artists who create all the images that go into a product. Such things include icons, bitmaps, window backgrounds, button images, animations, etc.
Obviously, everything needed to build a piece of software should be under some form of version control. Should the graphics people use the same version-control system and repository that the coders do? If not, what should they use, and what is the best way to keep everything synchronized?
We use subversion. Just place a folder under /trunk/docs for comps and have designers check out and commit to that folder. Works like a champ.
I would definately put the graphics under version control. The diff might not be very useful from within a diff tool like diffmerge, but you can still checkout two versions of the graphic and view them side by side to see the differences.
I don't see any reason why the resultant graphics shouldn't be kept in the save version control system that the coders use however when you're creating graphics using PSD files or PDN files you might want to create a seperate repository for those as they have a different context to the actual end jpeg or gif that is produced and deployed with the developed application.
@lomaxx TortoiseSVN includes a program called TortoiseIDiff which looks to be a diff for images. I haven't used it but looks intriguing.
Interesting question. I don't have a bunch of experience working directly with designers on a project. When I have, it's been through a contractual sort of agreement where they "delivered" a design. I have done some of my own design work for both web sites and desktop applications, and though I have not used source control in the past, I am in the process of implementing SVN for my own use as I am starting to do some paid freelance work. I intend to utilize version/source control precisely the way I would with source code. It just becomes another folder in the project trunk. The way I have worked without source control is to create an assets folder in which all media files that are equivalents of source code reside. I like to think of Photoshop PSD's as graphics source code while the JPEG output for a web site or otherwise is the compiled version.
In the case of working with designers, which is a distinct possibility I face in the near future, I'd like to make an attempt to have them "check-in" their different versions of their source files on a regular basis. I'll be curious to read what others with some experience will say in response to this.
With respect to diff and merging, I think the version control is more critical for graphics and media elements. If you think about it, most designers are going to be the sole owners of a file -- at least in the case of graphics -- or at least I would think that'd be the case. I'd be curious to hear from a designer.
We, too, just put the binaries in source control. We use Git, but it would apply just as well to Subversion.
One suggestion I have is to use SVGs where possible, because you can see actual differences. With binaries (most other image formats), the best you can get is a version history.
A lot of the graphics type people will want something more sophisticated than subversion. While it's good for version control, they will want a content management system that allows cross-referencing of assets, tagging, thumbnails and that sort of thing (as well as versioning).
Yes, having art assets in version control is very useful. You get the ability to track history, roll back changes, and you have a single source to do backups with. Keep in mind that art assets are MUCH larger so your server needs to have lots of disk space & network bandwidth.
I've had success with using perforce on very large projects (+100 GB), however we had to wrap access to the version control server with something a little more artist friendly.
I've heard some good things about Alienbrain as well, it does seem to have a very slick UI.
@Damian - Good point about the tagging and cross referencing. That's true; while I haven't working with many designers on a software development project, I have worked for a company that had a design department and know that this is an issue. Designers are still (perpetually) looking for the perfect system to handle this sort of thing. I think this is more suited to a design department for shared access, searching and versioning, etc to all assets -- where there is a business incentive to not reinvent the wheel wherever/whenever possible. I don't think it would apply for a project-oriented manner as tagging and cross referencing wouldn't be quite as applicable.
We keep the binary files and images in revision control, using Perforce. It's great!
We keep a lot of art assets, and it scales well for lots of large files. It recognizes binary files, the ones that can't be diffed, and stores them as full file copies in the back end.
It has P4V (cross-platform visual browser), and a thumbnail system so image files can be seen in the browser.
TortoiseSVN can show image revisions side-by-side, which is really useful. I've used it with different teams with a great degree of success. The artists loved having the ability to roll back things (after they got used to the concepts). It does take a lot of space, though.