onionskining

Onionskinning is a technique used in animation and drawing to view multiple frames or layers simultaneously, facilitating the creation of smooth, consistent motion. This method involves overlaying semi-transparent images or transparent sheets, allowing artists to compare the current drawing with previous or subsequent frames. The term derives from the layered appearance resembling the thin, translucent skin of an onion.

In traditional animation, onionskinning is achieved by placing multiple sheets of acetate or tracing paper over one another, each representing different frames. Digital animation software incorporates onionskinning features that display adjacent frames with adjustable transparency, enabling animators to check the continuity of motion and make precise adjustments. This technique aids in maintaining consistent character proportions, positioning, and timing across frames.

Onionskinning is fundamental to both hand-drawn and computer-generated animation, enhancing the animator's ability to visualize motion progression. It also serves as a valuable educational tool for students learning animation principles, allowing for detailed analysis of movement and timing.

Overall, onionskinning improves accuracy in frame-by-frame animation, reduces errors, and streamlines the workflow. Its continued use underscores its importance as a core technique in the animation production process.