enoughisenough: Do you feel like it is your artwork?
That's a good question. I think that the level of effort or involvement dictates that for me. I'll use a different application as an example: DAZ3D, which lets you use 3D models and build scenes, which you can then render or animate.
The application comes with some pre-built models, textures, and scenes. You can easily create a rendered 3D image by clicking a few buttons. You can even make it unique by moving the camera slightly, or changing the properties of the light, and so on. In other words, you can do very little work and get a fully-rendered image, or even a short animation. Is this your work? I'm on the fence about it. On the one hand, someone else created all of the parts and did 99% of the necessary work. On the other hand, the specific one you just built would not exist without that button press. And if pressing a button doesn't make the art yours, what of photography?
Now, there are people who will update the 3D items or build their own, and who will carefully set up the lights and the cameras and then export the finished scene to Photoshop. Just as some photographers go far beyond just point-and-shoot. I think those people put a clear stamp on the work, to the extent that it becomes a familiar style. Maybe that is when the work is really theirs.
I'm not sure where that line is. But I grew up drawing (and, very rarely, painting) and so I am used to doing the physical work of creating art from thought to final form. These days, I use digital tools extensively. Is the final product still mine? I think so. But I know some artists who would hesitate to say that what I produce now is my work. I think we're at the start of a long debate that will probably grow contentious in various communities.