A professor writes and explains a trigonometric proof on a traditional chalkboard. The case is useful for testing legible writing, instructional pacing, and continuity between speech and equations.
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Prompt · Original / Translation
A professor writes out a mathematical proof for trigonometric identities on a traditional chalkboard, explaining the step he is currently on in the equation.
Reusable method
Reusable structure
Extract “target result → the subject, scene, camera movement, and final action → constraints” as a reusable template for similar work.
Retest criteria
Run single-variable comparisons around shot length, transitions, and motion amplitude. Record the model, cost, and failures; turn it into a Skill only after it repeats reliably.
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Creator
chetaslua focuses on AI video production and publishes across X and X / 𝕏. “Professor at the Chalkboard” is the current representative case, built with Veo with a 90% stability reference.
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The camera follows a released arrow through an ancient battlefield, then pushes into a miniature war on the shaft. One continuous movement carries the scene from a vast battlefield to a microscopic civilization.
Prompt
Epic wide-angle shot of a vast ancient battlefield at golden hour, thousands of warriors clashing with swords and shields under a hazy amber sky thick with smoke and ash. A lone archer in weathered bronze armor, face streaked with dirt, draws a longbow with deliberate tension. The arrow releases with a sharp twang. Camera immediately snaps behind the arrow, tracking it in extreme slow motion as it cuts through drifting smoke and falling embers. Shallow depth of field keeps the arrow razor-sharp while the chaotic battlefield blurs behind. The camera pushes closer, tighter, until the wooden shaft fills the frame—revealing intricate carved runes and weathered grain. Seamless transition to macro scale: the arrow's surface becomes a landscape. A microscopic civilization of tiny warriors the size of splinters wages war across the fletching. Miniature catapults hurl fragments of dust. Warriors scale the carved runes like canyon walls. Torches flicker. Banners wave.
A character-led action sequence that combines martial-arts choreography with elemental effects. It is useful for studying motion continuity, effect timing, and character consistency.
Prompt
GPT Image 2 Prompt: Create a raw kung fu performance storyboard focused on extreme physical action. Use reference image for the character. 16:9 storyboard sheet, 12 cinematic panels. The actual storyboard drawings must be black and white only: rough pencil lines, minimal detail, fast gesture drawing energy, simple anatomy construction and strong silhouette readability. Keep the artwork lightweight, dynamic and unfinished like early fight choreography previs. Start directly in action. Do not begin with a calm stance, preparation shot or slow introduction. A solitary female performer executes an aggressive Tibetan kung fu master-style routine inside a vast ancient temple. The choreography is exaggerated, explosive and constantly escalating: flying diagonal kicks, monk-style low stances, rapid palm strikes, spinning cloth-like body turns, animal-form hand shapes, deep lunges, aerial twists, floor-level sweeps, sudden drops, claw-like blocks, back-arched jumps, sliding recoveries and violent sculptural impact poses. Every panel must contain visible motion and strong body momentum. Avoid static standing poses. The performer should feel like a ritual warrior moving with discipline, fury, spiritual pressure and total body control. Action progression: 1. begin mid-air with a flying diagonal kick already in motion 2. handheld close-up palm sweep cutting through air 3. orbiting wide shot of a full-body spin 4. low-angle impact palm strike with shockwave 5. long-lens side profile spinning kick 6. top-down aerial turn with body, hair and fabric flaring outward 7. hard floor stomp cracking the temple stone 8. sliding low sweep across the floor 9. aggressive close-up flurry of elbows, palms and backfist strikes 10. extreme low monk-style beast stance with energy rising 11. spinning elemental vortex around the body 12. final airborne action pose, suspended above the temple floor, body twisted in a powerful kung fu strike, all elements converging around her before impact Add selective elemental energy effects as VFX-style storyboard accents. The effects should feel spiritual, ritualistic and cinematic, not superhero-like: air bursts around spins and flying kicks, dust and stone fragments lifting from stomps, water-like floor ripples during slides, fire-like trails around explosive strikes, heat distortion around high-intensity movement, elemental vortex near the climax. Element progression: early panels: subtle wind, dust and pressure lines middle panels: stronger stone fragments, floor ripples and air shockwaves late panels: controlled fire trails and energy spirals final panel: the strongest combined elemental surge while the performer is still airborne Use cinematic arthouse action camerawork: handheld energy, whip-pan feeling, orbiting camera moves, overhead shots, side silhouettes, aggressive close-ups, long-lens compression, extreme low angles, wide negative space, strong parallax. Keep the temple environment minimal and atmospheric: towering stone columns, worn temple floor, drifting incense smoke, hanging fabric, harsh light shafts, faint dust in the air, subtle wet floor reflections. Do not overcrowd the frames. Annotation color system: red arrows = body movement blue arrows = camera movement green marks = framing / composition notes orange marks = lighting direction yellow marks = elemental VFX / energy effects black text = short lens notes and panel labels No timestamps. No dialogue. No singing. No extra characters. No enemies. No logos. No watermark. Seedance 2.0 Prompt: Create a 15-second cinematic kung fu performance video. Use @[image1] as the fixed character sheet reference. The character must strictly match the character sheet. Use @[image2] as the storyboard reference. Follow the storyboard shot by shot as the main source for action order, camera rhythm, body movement, framing, movement direction, camera angles and visual progression. Treat each storyboard panel as a sequential keyframe. Preserve the shot order and make the video feel like the storyboard has been translated into continuous live-action motion. The sequence must end on a frozen final frame while the performer is still airborne. Do not add text, captions, storyboard labels, arrows, UI, logos or watermarks. Do not treat the storyboard as a single image. Do not redesign the character, change the costume or alter the face. Do not begin with a calm stance, preparation pose or slow introduction. Do not make the elemental effects look like superhero powers or excessive fantasy glow. Visual style: stylized cinematic realism, high-end 3D painterly animation quality, dynamic cloth simulation, expressive silhouette design, rich cinematic lighting, controlled color palette, natural motion blur, dramatic scale, beautiful but aggressive physicality, premium feature-animation aesthetic. Environment: vast ancient temple, towering stone columns, worn temple floor, drifting incense smoke, hanging fabric, harsh light shafts, faint dust in the air, subtle wet floor reflections, high contrast shadows. The performance is a solitary female kung fu routine inside a vast ancient temple. The routine starts immediately in action, with no calm stance, no preparation pose and no slow introduction. The movement should feel aggressive, ritualistic, disciplined, physically extreme and spiritually charged. This is not a fight against an enemy. It is a solo performance of force, control, exhaustion, fury and release. Follow story board for choreography direction. Element progression: early sequence: subtle wind, dust and pressure lines responding to movement. middle sequence: stronger air shockwaves, stone fragments, floor cracks and water-like ripples across the temple floor. late sequence: controlled fire trails, heat distortion and energy spirals around explosive strikes and kicks. climax: wind, dust, stone, water ripple and fire accents combine into a stronger elemental vortex. final beat: the performer is airborne above the temple floor in a powerful kung fu strike, body twisted mid-air, hair and fabric flaring outward, with all elements converging around her before impact. Elemental VFX must feel spiritual, ritualistic and cinematic. The effects should be integrated with the choreography and motivated by physical movement. Keep the energy raw, elemental, atmospheric and grounded in the temple environment. Use Laban movement logic throughout: weight: strong, heavy, grounded during impacts, with brief lightness during jumps and aerial twists time: quick during strikes, kicks, drops and turns, sustained during suspended holds and recovery transitions space: direct during attacks, blocks and lunges, indirect during spinning turns and elemental vortex moments flow: bound during rooted stances and precise strikes, free during aerial motion, spinning fabric movement and elemental release

An eight-shot storyboard and generation prompt that compresses the croissant-making process into a clear 12-second sequence, ending on the flaky tear reveal.
Prompt
GPT Image 2 Storyboard prompt: “Create a crisp, clean infographic storyboard poster for THE CROISSANT BAKER. Wide 16:9 layout, white background, black borders, bold black typography, premium Pixar 3D stylized rendering, bright vivid colors — warm golden yellows, rich buttery creams, flaky browns, soft pastry whites, warm French bakery morning light. Top header: THE CROISSANT BAKER TOTAL VIDEO TIME: 12 SECONDS 8 SHOTS · WARM · FLAKY · IRRESISTIBLE Legend icons: ACTION, HEAT, TIME HINT, INGREDIENT Thin warm golden accent line running full width beneath header Same Pixar-style young French male baker throughout: white baker's jacket, flour-dusted hands, warm authentic French boulangerie setting, marble countertop, warm morning light streaming through windows, bread racks in background. Bright, warm, delicious. Every panel a completely different composition and color. 8 panels: THE OPENER — Wide shot of baker arriving at the boulangerie before dawn, tying apron, switching on the warm kitchen lights, marble counter visible, bread racks behind, flour dusting the air, full world established, bright and cinematic THE BUTTER BLOCK — Baker slams a massive cold block of European butter onto the marble counter with both hands, dramatic impact, flour cloud puffing up, close-up on hands, this is the bones moment — the start of everything THE LAMINATION — Baker folding the dough over the butter block precisely, rolling pin pressing down hard, layers building, side angle shot showing the beautiful layering beginning, confident and skilled THE ROLL — Dough rolled out into a large thin sheet, baker leaning into the rolling pin with full body weight, marble counter, flour dusting everywhere, wide shot showing the scale of the dough THE SHAPE — Triangles cut from the dough, baker rolling each one from the wide end into a tight crescent, hands moving fast and confident, close-up on the shaping, beautiful and precise THE EGG WASH — Baker brushing golden egg wash over each shaped croissant with a pastry brush, each one glistening beautifully, close-up overhead angle, warm golden color, stunning composition THE OVEN — Croissants slid into the blazing hot oven on a tray, oven door closed, through the oven glass croissants visibly puffing and turning deep golden, layers separating dramatically, warm orange glow THE TEAR — Baker pulls a perfect golden croissant from the rack, holds it up, tears it open slowly revealing hundreds of impossibly flaky buttery layers inside, steam escaping, butter glistening — this is the cheese pull moment, the hero shot of the entire video Footer: VIDEO FLOW: 8 shots × 1.5s = 12 seconds. Butter block to the tear. CAMERA TIPS: wide on opener, close-up on butter slam and shaping, side angle on lamination, overhead on egg wash, oven glass for panel 7, extreme close-up on the tear reveal LIGHT & STYLE: warm golden French bakery morning light, buttery cream tones, flour dust in the air, bright vivid Pixar colors, shallow depth of field on close-ups BAKER NOTES: one baker, one perfect croissant, one irresistible tear. The lamination layers and the final tear are everything — make them stunning.” Seedance 2.0 prompt: “Use the attached THE CROISSANT BAKER storyboard image as the exact reference. Create a 12-second 16:9 animated croissant-making sequence that follows the 8-shot storyboard exactly. Preserve the same Pixar-style young French male baker, white jacket, flour-dusted hands, warm authentic French boulangerie, marble counter, and bright golden color aesthetic throughout. Rules: •Follow the sequence exactly from 1 to 8 •One shot per panel, approximately 1.5 seconds each •No skipped steps, no extra steps beyond the storyboard •Maintain character and bakery continuity throughout •Emphasize the butter slam, lamination layers, crescent shaping, egg wash glisten, oven puff, and final flaky tear reveal Shot sequence: 1.Baker arrives before dawn, ties apron, switches on warm kitchen lights — wide establishing shot, full boulangerie world visible 2.Massive cold butter block slammed onto marble counter — dramatic impact, flour cloud explosion, close-up hands only 3.Dough folded precisely over butter, rolling pin pressing down hard — side angle, beautiful layers building 4.Dough rolled into large thin sheet — baker leaning into rolling pin with full body weight, flour dusting everywhere 5.Triangles cut and rolled into tight crescents — hands moving fast and confident, close-up on shaping 6.Golden egg wash brushed over each croissant — pastry brush close-up, each one glistening, overhead angle 7.Croissants in blazing oven — through oven glass puffing dramatically, turning deep golden, layers separating, warm orange glow 8.Baker tears open a perfect golden croissant — hundreds of flaky buttery layers revealed, steam escaping, butter glistening, pure satisfaction Camera: •Wide establishing shot for the opener •Close-up hands only for butter slam and crescent shaping •Side angle for the lamination •Wide shot for the dough roll •Overhead for the egg wash •Oven glass shot for panel 7 •Extreme close-up hero shot for the final tear Style: •Warm golden French bakery morning light throughout •Buttery cream tones, flour dust particles in the air, marble counter •Pixar CGI vivid expressive animation •Shallow depth of field on close-up shots •Smooth satisfying cuts, warm and joyful energy throughout Goal: A mouth-watering 12-second croissant journey from butter block to flaky tear — warm, golden, layered, and impossible to scroll past.“