OCTOBER 12, 2001
Post Processing in Studio Artist
Using autorotoscoping tools on 3D animations
David Nagel
Page 2 of 6

The goal
For this one, I'm going to take an animation of a skater and make it look as if each frame had been individually painted. In my prep work for this piece, I wound up with two results that I liked, but we'll just take a look at the first one, as I think it's more of a crowd pleaser than the second. Each one started off as a render from Curious Labs Poser 4. I didn't pay any special attention to the quality of the render because I knew I'd be making significant changes in the end, and Studio Artist is both resolution-independent and very forgiving when it comes to the quality of your source material. [an error occurred while processing this directive] NOTE: If you'd like to see these effects in action for yourself, you can download my own Paint Action Sequences (PASeqs) and apply them to your own footage. You can download them here. To use these, just unstuff them and then go into Studio Artist and select Action > Import Paint Action Sequence. In the last part of this article, we discuss how to apply these actions to a movie.

So let's take a look at what we're going to do here. The first two examples below were rotoscoped from the third example below. You can click on the two processed images to see the animations, bearing in mind that compression for the Web has reduced the quality of the output.





I'm a fan of both of these. The first one looks something like colored pencil with acrylics, while the second looks like a bad photocopy that's been drawn over with a marker or watercolor pen. These in no way represent the limits of Studio Artist, but let's see how these particular pieces were made.

TIP: In Studio Artist, every stroke of every frame is unique, which requires special considerations. If you use a "normal" frame rate of 24 or 30 FPS, your background will look more like noise than art. So lower the frame rate to 8 or 10 FPS, at the most. You can then remap your footage in a compositing application, such as Adobe After Effects, to run at your desired frame rate.

Incidentally, if you'd like to take the easy way out and download the actual (tiny, 18 KB) actions that created these movies, just click here. You can load these up one at a time in Studio Artist by opening your Paint Action window, erasing the current sequence and then choosing Action > Import Paint Action Sequence.



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