Line Test
A Line Test is a process used to check hand drawn frames prior to them being used for final artwork. Frames are captured either via a video camera, frame by frame or by scanning them into a computer. The resulting sequence allows the animator to assess how well the sequence is flowing. If the result is unsatisfactory then the animator can simply re-draw, add or delete frames and then create another line test.
Onion Skinning is a method used to to view several frames of an animation simultaneously, it allows the animator to check the changes occurring within each frame and how they flow together. Traditionally this process involved comparing drawn frames on a light box but many animation software packages include the ability to preview frames with several previous and upcoming translucent frames visible.
Try it for yourself...
You can see how a Line Test works by using the demonstration below. Adjust the amount of Onion Skin layers displayed in the animation by selecting an option from the drop-down menu. Press the 'Play' button to start, use the Playback slider to go backwards and forwards or use the 'Next' and 'Prev' buttons to move through the frames one at a time.
