technique · 1 recipe
Aperture Masking
An opaque shaped surround makes the act of looking visible through a defined opening.
Selected recipe
Masking
This is the default recipe for the Fixed Aperture Mask family.
Free short AI video prompt
A starter line you can copy. The full timed recipe, still-image and production prompts are on the shot card.
Prompt rule: Keep a fixed opaque aperture matte over a full source plate; motion happens inside, not in the mask.
Masking: An opaque shaped surround makes the act of looking visible through a defined opening. Keep the subject readable; motivate camera and light.
Technique guide
- When to use
- Reach for Masking when you need this effect: An opaque shaped surround makes the act of looking visible through a defined opening.
- How it works
- Keep a fixed opaque aperture matte over a full source plate; motion happens inside, not in the mask.
- Common mistakes
- If the result does not follow this rule, it is not this technique: Keep a fixed opaque aperture matte over a full source plate; motion happens inside, not in the mask. Do not change multiple variables at once so the effect becomes unreadable.
How to read this page
Aperture Masking is one technique in Optical Effects. The definition states the single mechanism the frame has to show. The technique guide covers when to use it, the steps, the usual mistakes, how it differs from the neighbors, and what a successful take looks like.
The clip above is one reading, made with a third-party video model. Another model, or the same model on another day, can land on a different frame. It is an example, not a promise that a prompt will match it.
The free short prompt is a starter sentence. The shot card is the timed recipe: scene, start and end frames, action, light, and color. Three sample cards are free on the site. The rest are part of GrokCine Pro. A second name for the same shot keeps its own URL and points back at this definition.
When you write a prompt, keep the one mechanism in the definition, then name the subject, the motion, and why the light is there. Do not stack a neighboring technique into the same sentence. If the name or the example is wrong, send this page's URL from the contact page.
Recipe
8 seconds · single take
A 1926 murder mystery in a Riga merchant's townhouse: through the keyhole of the locked study, the young maid sees only the grandfather clock's pendulum still swinging in the silent room.
Shot cards
The full recipe for Masking is a shot card
The full recipe for Masking is a shot card. The start and end frames, timed action, lighting and color specs, a camera parameter table, copy-ready still-image and video prompts and negatives are open to GrokCine Pro members on the web.
Related families
- Lens Flare
Lens FlareStray light inside the imaging optics creates source-dependent ghosts or veiling glare that changes when the source is blocked. - Double Exposure
Double ExposureTwo image records coexist within the same frame through a controlled blend, instead of trading places as a transition. - Split Screen
Split ScreenTwo separately photographed or generated image fields are visible at the same time within one composed frame.
More in Optical Effects
References
Sources we studied for this technique. External links; we don't embed them.
Articles & definitions
- Wikipedia: Masking (art)
Wikipedia · Web
Masking protects or shapes part of an image so only a defined area shows.
Images & stills
- Lunar eclipse through binoculars
@leopardstealth · 2021-11-19 · X
Lunar eclipse through binoculars: black surround around a bright circular view.
- Binocular shot of sea and sky
@Shakti_Shetty · 2021-11-04 · X
A "binocular shot" of sea and sky — the circular binocular mask frames the view.