Horror Animatic

A 45-second psychological horror film generated entirely via procedural code.

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Description

A hand-drawn psychological horror animatic created by Sahil Panhotra using GPT-6.1 Sol to generate the entire visual and procedural audio engine in code. The build utilizes 8.6M tokens to synchronize storyboard-style animation with a synthesized soundtrack of oscillators, filtered noise, and dissonant drones without using traditional video generation models.

Descriptions, tags, and model credits may be AI-generated or inferred from public sources and can be incomplete or wrong. Learn more.

Details

Why this is interesting: A landmark demonstration of high-reasoning LLMs generating complex, synchronized video and procedural audio entirely…
Attributed to: @sahilpanhotra
Built with: GPT-6.1 Sol FLUX 3 Video K2.7 Code North Mini Code Grok Video 1.5 GPT-5 Codex Codex
Tags: #horror #animatic #procedural-audio #codex

Discovered: X
First posted: X · Sep 30, 2026
Listed: Added 2h ago
Build: Moderate
Models: Strong

Prompts

Prompt 1

Create a 45-second psychological horror animatic set entirely in a narrow apartment hallway at night.

The horror revolves around a motion-sensor hallway light and a figure that appears to move whenever the hallway becomes dark.

VISUAL STYLE

Rough hand-drawn storyboard aesthetic.

Loose, wobbly black linework.
Scribbled hatching for shadows.
Flat muted colors.
Dark gray and almost-black environment.
Only one warm accent color: the protagonist wears a faded beige hoodie.
Animation deliberately feels low-frame-rate, approximately animated on threes.
The protagonist and environment should feel imperfectly hand drawn.
The mysterious figure is initially barely distinguishable from the scribbled darkness.
As the story progresses, the darkness at the far end of the hallway becomes increasingly dense with overlapping pencil strokes.

No polished anime rendering.
No photorealism.
No VHS/glitch effects.
No text.

ENVIRONMENT

A long, narrow apartment hallway at night.

Locked apartment doors line both sides.
At the far end is a dark stairwell entrance.
One ceiling-mounted motion-sensor light illuminates the middle of the hallway.
The protagonist's apartment door is close to camera.
The far stairwell remains visible in the same composition for almost the entire film.

A small pair of shoes sits outside one neighboring apartment.

A fire extinguisher is mounted on the wall.

Keep the environment simple enough that tiny changes are noticeable.

CAMERA

One fixed, locked-off wide shot looking down the hallway.

ABSOLUTELY NO CAMERA MOVEMENT for the first 39 seconds.

No pans.
No zooms.
No artificial camera shake during scares.

The horror happens inside the frame.

Only the final reveal may use a slow camera movement.

AUDIO — CRITICAL

GENERATE THE ENTIRE SOUNDTRACK AND SOUND DESIGN IN CODE.

Audio is a major part of the horror and must be synchronized precisely with the animation timeline.

Do NOT simply attach a generic horror music loop.

Build the soundtrack procedurally using oscillators, filtered noise, synthesized drones, pulses, impacts, electrical sounds, sub-bass, breathing, footsteps and other generated audio elements.
Every major visual event must have a corresponding intentional audio event.
The soundtrack should evolve with the story.

Base horror score

Start with an almost inaudible low-frequency drone.

Use layered sine/triangle oscillators with subtle detuning to create uncomfortable beating frequencies.

Add extremely quiet filtered noise for room tone.

Gradually introduce dissonant frequencies as the supernatural events escalate.

Keep the music minimal during normal moments.

The audience should almost FEEL the low frequencies before consciously noticing the music.

Motion-sensor motif

Every time the light activates:

CLICK

followed by a tiny electrical buzz.

Give this sound exactly the same timing initially so the audience subconsciously learns it.

Later, break this pattern.

Figure motif

Whenever the figure has moved closer, introduce a very low sub-bass pulse.

Do not make this an obvious musical sting at first.

First appearance = barely audible.

Second appearance = noticeably stronger.

Final reveal = extremely deep and uncomfortable.

Jump scares

Jump scares must be synchronized to the EXACT visual frame where the frightening movement occurs.

Use:

sudden broadband impact,
short sub-bass hit,
sharp transient,
brief burst of distorted noise.

Do NOT use cheesy stock horror screams.

The scare should come from the sudden difference between the quiet preceding moment and the violent transient.

Immediately reduce the volume again afterward.

Dynamic range is important.

Quiet sections must actually be quiet so the jump scares hit hard.

SCENE 1 — 0–7s

The protagonist enters carrying a grocery bag.

He walks toward his apartment.

CLICK.
The motion-sensor light activates.
The hallway becomes visible.
Nothing unusual.

He places the groceries down and searches his pockets for his keys.

Hold the static composition.

AUDIO

Very faint electrical room tone.
Almost inaudible low drone around the bottom of the frequency range.
Footsteps synchronize exactly with his feet touching the floor.
Small grocery-bag rustles.
Keys jingle naturally.
Motion sensor:

CLICK → electrical hum.

No obvious horror music yet.
The viewer should simply feel slightly uncomfortable.

SCENE 2 — 7–16s

He struggles with his keys.
The motion-sensor light expires.
CLICK.
Darkness.
Three seconds.
He waves his arm.
CLICK.
Light returns.
A tall silhouette now stands inside the stairwell at the far end.
The protagonist doesn't notice.
The audience hopefully does.

AUDIO

When darkness begins, remove several high frequencies from the soundtrack.
The room suddenly feels acoustically empty.
During the three seconds of darkness, slowly introduce a barely audible low-frequency pulse.
When the light returns and reveals the figure:
DO NOT use a jump-scare sting.
Instead introduce one deep bass tone exactly as the figure becomes…

Source

Prompt 2

Create a 45-second psychological horror animatic set entirely in a narrow apartment hallway at night. The horror revolves around a motion-sensor hallway light and a figure that appears to move whenever the hallway becomes dark. VISUAL STYLE Rough hand-drawn storyboard aesthetic. Loose, wobbly black linework. Scribbled hatching for shadows. Flat muted colors. Dark gray and almost-black environment. Only one warm accent color: the protagonist wears a faded beige hoodie. Animation deliberately feels low-frame-rate, approximately animated on threes. The protagonist and environment should feel imperfectly hand drawn. The mysterious figure is initially barely distinguishable from the scribbled darkness. As the story progresses, the darkness at the far end of the hallway becomes increasingly dense with overlapping pencil strokes. No polished anime rendering. No photorealism. No VHS/glitch effects. No text. ENVIRONMENT A long, narrow apartment hallway at night. Locked apartment doors line both sides. At the far end is a dark stairwell entrance. One ceiling-mounted motion-sensor light illuminates the middle of the hallway. The protagonist's apartment door is close to camera. The far stairwell remains visible in the same composition for almost the entire film. A small pair of shoes sits outside one neighboring apartment. A fire extinguisher is mounted on the wall. Keep the environment simple enough that tiny changes are noticeable. CAMERA One fixed, locked-off wide shot looking down the hallway. ABSOLUTELY NO CAMERA MOVEMENT for the first 39 seconds. No pans. No zooms. No artificial camera shake during scares. The horror happens inside the frame. Only the final reveal may use a slow camera movement. AUDIO — CRITICAL GENERATE THE ENTIRE SOUNDTRACK AND SOUND DESIGN IN CODE. Audio is a major part of the horror and must be synchronized precisely with the animation timeline. Do NOT simply attach a generic horror music loop. Build the soundtrack procedurally using oscillators, filtered noise, synthesized drones, pulses, impacts, electrical sounds, sub-bass, breathing, footsteps and other generated audio elements. Every major visual event must have a corresponding intentional audio event. The soundtrack should evolve with the story. Base horror score Start with an almost inaudible low-frequency drone. Use layered sine/triangle oscillators with subtle detuning to create uncomfortable beating frequencies. Add extremely quiet filtered noise for room tone. Gradually introduce dissonant frequencies as the supernatural events escalate. Keep the music minimal during normal moments. The audience should almost FEEL the low frequencies before consciously noticing the music. Motion-sensor motif Every time the light activates: CLICK followed by a tiny electrical buzz. Give this sound exactly the same timing initially so the audience subconsciously learns it. Later, break this pattern. Figure motif Whenever the figure has moved closer, introduce a very low sub-bass pulse. Do not make this an obvious musical sting at first. First appearance = barely audible. Second appearance = noticeably stronger. Final reveal = extremely deep and uncomfortable. Jump scares Jump scares must be synchronized to the EXACT visual frame where the frightening movement occurs. Use: sudden broadband impact, short sub-bass hit, sharp transient, brief burst of distorted noise. Do NOT use cheesy stock horror screams. The scare should come from the sudden difference between the quiet preceding moment and the violent transient. Immediately reduce the volume again afterward. Dynamic range is important. Quiet sections must actually be quiet so the jump scares hit hard. SCENE 1 — 0–7s The protagonist enters carrying a grocery bag. He walks toward his apartment. CLICK. The motion-sensor light activates. The hallway becomes visible. Nothing unusual. He places the groceries down and searches his pockets for his keys. Hold the static composition. AUDIO Very faint electrical room tone. Almost inaudible low drone around the bottom of the frequency range. Footsteps synchronize exactly with his feet touching the floor. Small grocery-bag rustles. Keys jingle naturally. Motion sensor: CLICK → electrical hum. No obvious horror music yet. The viewer should simply feel slightly uncomfortable. SCENE 2 — 7–16s He struggles with his keys. The motion-sensor light expires. CLICK. Darkness. Three seconds. He waves his arm. CLICK. Light returns. A tall silhouette now stands inside the stairwell at the far end. The protagonist doesn't notice. The audience hopefully does. AUDIO When darkness begins, remove several high frequencies from the soundtrack. The room suddenly feels acoustically empty. During the three seconds of darkness, slowly introduce a barely audible low-frequency pulse. When the light returns and reveals the figure: DO NOT use a jump-scare sting. Instead introduce one deep bass tone exactly as the figure becomes visible. Almost subliminal. Continue the key sounds normally. T…

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Film & Video

Horror Animatic

A 45-second psychological horror film generated entirely via procedural code.

bySahil Panhotra | Indie Builder

Horror Animatic media is blocked

Allow external media to connect to the provider and play this content.

Description

Descriptions, tags, and model credits may be AI-generated or inferred from public sources and can be incomplete or wrong. Learn more.

Details

Why this is interesting: A landmark demonstration of high-reasoning LLMs generating complex, synchronized video and procedural audio entirely…
Attributed to: @sahilpanhotra
Built with: GPT-6.1 Sol FLUX 3 Video K2.7 Code North Mini Code Grok Video 1.5 GPT-5 Codex Codex
Tags: #horror #animatic #procedural-audio #codex

Discovered: X
First posted: X · Sep 30, 2026
Listed: Added 2h ago
Build: Moderate
Models: Strong

Prompts

Prompt 1

Create a 45-second psychological horror animatic set entirely in a narrow apartment hallway at night.

The horror revolves around a motion-sensor hallway light and a figure that appears to move whenever the hallway becomes dark.

VISUAL STYLE

Rough hand-drawn storyboard aesthetic.

No polished anime rendering.
No photorealism.
No VHS/glitch effects.
No text.

ENVIRONMENT

A long, narrow apartment hallway at night.

A small pair of shoes sits outside one neighboring apartment.

A fire extinguisher is mounted on the wall.

Keep the environment simple enough that tiny changes are noticeable.

CAMERA

One fixed, locked-off wide shot looking down the hallway.

ABSOLUTELY NO CAMERA MOVEMENT for the first 39 seconds.

No pans.
No zooms.
No artificial camera shake during scares.

The horror happens inside the frame.

Only the final reveal may use a slow camera movement.

AUDIO — CRITICAL

GENERATE THE ENTIRE SOUNDTRACK AND SOUND DESIGN IN CODE.

Audio is a major part of the horror and must be synchronized precisely with the animation timeline.

Do NOT simply attach a generic horror music loop.

Base horror score

Start with an almost inaudible low-frequency drone.

Use layered sine/triangle oscillators with subtle detuning to create uncomfortable beating frequencies.

Add extremely quiet filtered noise for room tone.

Gradually introduce dissonant frequencies as the supernatural events escalate.

Keep the music minimal during normal moments.

The audience should almost FEEL the low frequencies before consciously noticing the music.

Motion-sensor motif

Every time the light activates:

CLICK

followed by a tiny electrical buzz.

Give this sound exactly the same timing initially so the audience subconsciously learns it.

Later, break this pattern.

Figure motif

Whenever the figure has moved closer, introduce a very low sub-bass pulse.

Do not make this an obvious musical sting at first.

First appearance = barely audible.

Second appearance = noticeably stronger.

Final reveal = extremely deep and uncomfortable.

Jump scares

Jump scares must be synchronized to the EXACT visual frame where the frightening movement occurs.

Use:

sudden broadband impact,
short sub-bass hit,
sharp transient,
brief burst of distorted noise.

Do NOT use cheesy stock horror screams.

The scare should come from the sudden difference between the quiet preceding moment and the violent transient.

Immediately reduce the volume again afterward.

Dynamic range is important.

Quiet sections must actually be quiet so the jump scares hit hard.

SCENE 1 — 0–7s

The protagonist enters carrying a grocery bag.

He walks toward his apartment.

CLICK.
The motion-sensor light activates.
The hallway becomes visible.
Nothing unusual.

He places the groceries down and searches his pockets for his keys.

Hold the static composition.

AUDIO

CLICK → electrical hum.

No obvious horror music yet.
The viewer should simply feel slightly uncomfortable.

SCENE 2 — 7–16s

AUDIO

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Prompt 2

Source

Horror Animatic

Description

How it grew

Horror Animatic

Description

How it grew