I’ve been looking at unity and going over the tutorials, both with import 3d graphics. I am coming from a flash background (in terms of game dev) and I was wondering how it would be possible to load Photoshop character animations? (gif format?) and how would the collision detection work on an image file?
well you can import .gif images into unity and set them as textures for planes. And there is no collision detection for image files but what you should do is go to unity3d.com click on resources and do the 2d tutorial that is the easiest as for getting started for 2d stuff.
for more info or help pm me or ask angry ant for he can tell you most if not all things you need to know.
Have a look at this: unifycommunity.com
I think this is pretty much what you want.
Regarding the collision detection have a look at this: http://www.unifycommunity.com/wiki/index.php?title=2DShooter
If I remember correctly, the idea is to add some small triggers at certains parts of the image and detect if it’s been touched.
Hope it helps.