Pinscreen Animation vs Sand Animation
ピンスクリーン・アニメーション / 砂アニメーション
Both sit in Animation Techniques, so the question is not what they belong to but how they behave. They are reached for with some of the same intent, which is where they get confused.
Pinscreen Animation

Pinscreen animation pushes and pulls a field of movable pins, photographing each state under side light. Pin height becomes a continuous range from white to deep black, so print-like grain and sculptural light transform over time.
Sand Animation

Sand animation moves grains across a light table frame by frame. Thickness controls transmitted light from amber to black, and every contour continually breaks apart as its particles become the next image.
| Pinscreen Animation | Sand Animation | |
|---|---|---|
| Era | 1930s– | 1960s– |
| Family | Animation Techniques | Animation Techniques |
| Kind | Technique | Technique |
| Cues | Gray tone built from tiny points and short shadows / Soft monochrome contours dissolving into grain / Countless shadows aligned to one side light / Continuous transformations sculpted after smoothing the previous state | Transmitted tone ranging from amber to black by sand thickness / Finger-drawn grooves and pushed granular edges / The next image emerging from traces swept out of the last / Uneven particles scattering around contours |
| Best used for | Expressing dream, memory or transformation through monochrome images that physically dissolve · Animating the deep tonal field of printmaking without reducing it to line drawing | Telling fable, dream or natural cycle through images that form and vanish in one field · Adding hand-paced granular abstraction to music or spoken narration |
| Type | Use short medium-weight words on still areas so lettering survives the pin shadows. | Draw only short words as broad grooves or density changes, placing longer reading in separate subtitles. |
| Composition | Establish one large light-dark mass, vary pin height most finely at the focus, and let the outside contour dissolve into grain. | Keep the light table broadly open and gather dark sand at the focus. Choose one part of each image to carry into the next. |
| Material | Space the pins evenly and lock one side-light direction. Push pins in for white, draw them out for black, and carve intermediate tone through height. | Spread even-grained sand thinly over transmitted light, build darkness by depth, and record each move made by finger, brush or card. |
| Caution | A photograph with grain or pencil filters is not a pinscreen. Tone must come from pin height and light direction, physically rebuilt for each frame. | Sand-colored noise or footage of a finished sand picture is not the technique. Grain thickness, transmitted light and physical redistribution must form every frame. |