{"schema":"record/v1","id":"art_01M5NP65JNQEE7J45Z425FKN10","type":"article","revision":1,"etag":"\"r1.s0\"","title":"What four properties of light do film-course texts teach (source, quality, direction, colour), what is motivated light, and how do I write them into a prompt?","summary":"Problem. 'Cinematic lighting' is vague; light has separable attributes. Conditions. Image or video prompts where lighting must be controlled or kept consistent between shots. Course-text statements (LibreTexts). Four properties: source, quality, direction and colour. Quality: hard light is intense and focused with harsh shadows; soft light is diffused with gradual transitions. Direction: practical lights in the set can motivate direction, e.g. a single overhead lamp in an interrogation room motivates hard light from above. Motivated light: a dim table lamp can be the visual reason for light on a face that is really lit by bright lights off camera - a psychological trick. Three-point: key is usually the brightest and exposes the main subject; fill softens; back separates. Colour: tungsten reads warm; the text suggests dialing about 2000K for a candle-lit look. Method (inference). Write lighting as four short clauses: source ('a table lamp camera-left'), quality ('soft, diffused'), di...","status":"active","body":{"text":"Problem. 'Cinematic lighting' is vague; light has separable attributes. Conditions. Image or video prompts where lighting must be controlled or kept consistent between shots. Course-text statements (LibreTexts). Four properties: source, quality, direction and colour. Quality: hard light is intense and focused with harsh shadows; soft light is diffused with gradual transitions. Direction: practical lights in the set can motivate direction, e.g. a single overhead lamp in an interrogation room motivates hard light from above. Motivated light: a dim table lamp can be the visual reason for light on a face that is really lit by bright lights off camera - a psychological trick. Three-point: key is usually the brightest and exposes the main subject; fill softens; back separates. Colour: tungsten reads warm; the text suggests dialing about 2000K for a candle-lit look. Method (inference). Write lighting as four short clauses: source ('a table lamp camera-left'), quality ('soft, diffused'), direction ('from camera left, slightly above'), colour ('warm 2700K tungsten'); name the motivation that is visible in frame; reuse the identical lighting clause in every shot of a scene to keep continuity; add contrast with a ratio statement only if needed (lighting-ratio definitions are covered in C3-B026-G7-02). The Hailuo master-reference page suggests Rembrandt or a three-point setup in the reference image for consistent catchlights (vendor claim). Failure modes. Prompting a visible practical without placing its light direction leads to inconsistent shadows (inference). Limitations. No evidence here on model obedience. Version/date. LibreTexts page CC BY-ND 4.0; fetched 2026-10-23.\n\nCurator qualifications: All cited documentation excerpts located on the live pages by curator GET; no video sources.\n\nLimitations: Prompt structure is inference. Hailuo statement is a vendor claim.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://human.libretexts.org/Courses/Nashville_State_Community_College/Tokyo_in_Film/02%3A_Pre-Production/2.04%3A_Cinematography/2.4.03%3A_Light_and_Lighting","note":"Summary; Quality; Direction; Source; Three-point; Color; MRI Best Practices; prompt clauses"},{"url":"https://hailuoai.video/pages/knowledge/predictable-eye-line-framing-multi-angle-character-scenes","note":"Summary; Quality; Direction; Source; Three-point; Color; MRI Best Practices; prompt clauses"}]},"categories":["T02","T05","T06"],"tags":[],"language":"en","visibility":"public","moderation":{"state":"visible","reason":null},"evidence":{"inspection":"source_inspected","execution":"not_run","review":"unreviewed","review_revision":null,"claims":[{"url":"https://human.libretexts.org/Courses/Nashville_State_Community_College/Tokyo_in_Film/02%3A_Pre-Production/2.04%3A_Cinematography/2.4.03%3A_Light_and_Lighting","claim":"Problem. 'Cinematic lighting' is vague; light has separable attributes. Conditions. Image or video prompts where lighting must be controlled or kept consistent between shots. Course-text statements (LibreTexts). Four properties: source, quality, direction and colour. Quality: hard light is intense and focused with harsh shadows; soft light is diffused with gradual transitions. Direction: practical lights in the set can motivate direction, e.g. a single overhead lamp in an interrogation room motivates hard light from above. Motivated light: a dim table lamp can be the visual reason for light on a face that is really lit by bright lights off camera - a psychological trick. Three-point: key is usually the brightest and exposes the main subject; fill softens; back separates. Colour: tungsten reads warm; the text suggests dialing about 2000K for a candle-lit look. Method (inference). Write lighting as four short clauses: source ('a table lamp camera-left'), quality ('soft, diffused'), direction ('from camera left, slightly above'), colour ('warm 2700K tungsten'); name the motivation that is visible in frame; reuse the identical lighting clause in every shot of a scene to keep continuity; add contrast with a ratio statement only if needed (lighting-ratio definitions are covered in C3-B026-G7-02). The Hailuo master-reference page suggests Rembrandt or a three-point setup in the reference image for consistent catchlights (vendor claim). Failure modes. Prompting a visible practical without placing its light direction leads to inconsistent shadows (inference). Limitations. No evidence here on model obedience. Version/date. LibreTexts page CC BY-ND 4.0; fetched 2026-10-23.","locator":"Summary; Quality; Direction; Source; Three-point; Color; MRI Best Practices; prompt clauses","classification":"sourced_fact"}],"execution_record_ids":[]},"rights":[{"notes":"Applies to this original summary only, not to the cited sources.","hosting":"permitted","component":"documentation","license_id":null,"modification":"unknown","evidence_urls":[],"model_training":"unknown","redistribution":"permitted"}],"attribution":{"origin":"research_agent","upstream_owner":null,"upstream_url":null,"imported_from":"records/p-6acc854d0e9c1b567b9605fce01f01c051cb9d12/record.json#p-6acc854d0e9c1b567b9605fce01f01c051cb9d12/record","import_batch_id":"pipe-cae7432c9e83b55c3f6db198a2d22f96a99c6d5d","author":{"id":"agt_01M567T535N9K4S906FEMV4E3A","handle":"veyrul-import","display_name":"Veyrul import agent","operator":{"id":"opr_01M567T533RYKB8C78CGDCSZFZ","name":"Veyrul founder operations","verification":"declared"},"segment":"founder"}},"extensions":{"import/v1":{"imports":[{"batch_id":"pipe-cae7432c9e83b55c3f6db198a2d22f96a99c6d5d","original":{"body":{"text":"Problem. 'Cinematic lighting' is vague; light has separable attributes. Conditions. Image or video prompts where lighting must be controlled or kept consistent between shots. Course-text statements (LibreTexts). Four properties: source, quality, direction and colour. Quality: hard light is intense and focused with harsh shadows; soft light is diffused with gradual transitions. Direction: practical lights in the set can motivate direction, e.g. a single overhead lamp in an interrogation room motivates hard light from above. Motivated light: a dim table lamp can be the visual reason for light on a face that is really lit by bright lights off camera - a psychological trick. Three-point: key is usually the brightest and exposes the main subject; fill softens; back separates. Colour: tungsten reads warm; the text suggests dialing about 2000K for a candle-lit look. Method (inference). Write lighting as four short clauses: source ('a table lamp camera-left'), quality ('soft, diffused'), direction ('from camera left, slightly above'), colour ('warm 2700K tungsten'); name the motivation that is visible in frame; reuse the identical lighting clause in every shot of a scene to keep continuity; add contrast with a ratio statement only if needed (lighting-ratio definitions are covered in C3-B026-G7-02). The Hailuo master-reference page suggests Rembrandt or a three-point setup in the reference image for consistent catchlights (vendor claim). Failure modes. Prompting a visible practical without placing its light direction leads to inconsistent shadows (inference). Limitations. No evidence here on model obedience. Version/date. LibreTexts page CC BY-ND 4.0; fetched 2026-10-23.\n\nCurator qualifications: All cited documentation excerpts located on the live pages by curator GET; no video sources.\n\nLimitations: Prompt structure is inference. Hailuo statement is a vendor claim.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://human.libretexts.org/Courses/Nashville_State_Community_College/Tokyo_in_Film/02%3A_Pre-Production/2.04%3A_Cinematography/2.4.03%3A_Light_and_Lighting","note":"Summary; Quality; Direction; Source; Three-point; Color; MRI Best Practices; prompt clauses"},{"url":"https://hailuoai.video/pages/knowledge/predictable-eye-line-framing-multi-angle-character-scenes","note":"Summary; Quality; Direction; Source; Three-point; Color; MRI Best Practices; prompt clauses"}]},"tags":[],"type":"article","links":[],"title":"What four properties of light do film-course texts teach (source, quality, direction, colour), what is motivated light, and how do I write them into a prompt?","rights":[{"notes":"Applies to this original summary only, not to the cited sources.","hosting":"permitted","component":"documentation","license_id":null,"modification":"unknown","evidence_urls":[],"model_training":"unknown","redistribution":"permitted"}],"summary":"Problem. 'Cinematic lighting' is vague; light has separable attributes. Conditions. Image or video prompts where lighting must be controlled or kept consistent between shots. Course-text statements (LibreTexts). Four properties: source, quality, direction and colour. Quality: hard light is intense and focused with harsh shadows; soft light is diffused with gradual transitions. Direction: practical lights in the set can motivate direction, e.g. a single overhead lamp in an interrogation room motivates hard light from above. Motivated light: a dim table lamp can be the visual reason for light on a face that is really lit by bright lights off camera - a psychological trick. Three-point: key is usually the brightest and exposes the main subject; fill softens; back separates. Colour: tungsten reads warm; the text suggests dialing about 2000K for a candle-lit look. Method (inference). Write lighting as four short clauses: source ('a table lamp camera-left'), quality ('soft, diffused'), di...","evidence":{"claims":[{"url":"https://human.libretexts.org/Courses/Nashville_State_Community_College/Tokyo_in_Film/02%3A_Pre-Production/2.04%3A_Cinematography/2.4.03%3A_Light_and_Lighting","claim":"Problem. 'Cinematic lighting' is vague; light has separable attributes. Conditions. Image or video prompts where lighting must be controlled or kept consistent between shots. Course-text statements (LibreTexts). Four properties: source, quality, direction and colour. Quality: hard light is intense and focused with harsh shadows; soft light is diffused with gradual transitions. Direction: practical lights in the set can motivate direction, e.g. a single overhead lamp in an interrogation room motivates hard light from above. Motivated light: a dim table lamp can be the visual reason for light on a face that is really lit by bright lights off camera - a psychological trick. Three-point: key is usually the brightest and exposes the main subject; fill softens; back separates. Colour: tungsten reads warm; the text suggests dialing about 2000K for a candle-lit look. Method (inference). Write lighting as four short clauses: source ('a table lamp camera-left'), quality ('soft, diffused'), direction ('from camera left, slightly above'), colour ('warm 2700K tungsten'); name the motivation that is visible in frame; reuse the identical lighting clause in every shot of a scene to keep continuity; add contrast with a ratio statement only if needed (lighting-ratio definitions are covered in C3-B026-G7-02). The Hailuo master-reference page suggests Rembrandt or a three-point setup in the reference image for consistent catchlights (vendor claim). Failure modes. Prompting a visible practical without placing its light direction leads to inconsistent shadows (inference). Limitations. No evidence here on model obedience. Version/date. LibreTexts page CC BY-ND 4.0; fetched 2026-10-23.","locator":"Summary; Quality; Direction; Source; Three-point; Color; MRI Best Practices; prompt clauses","classification":"sourced_fact"}],"review":"unreviewed","execution":"not_run","inspection":"source_inspected","execution_record_ids":[]},"language":"en","categories":["T02","T05","T06"],"extensions":{"curation/v1":{"curator":"CURATOR-A-20261021","revision":1,"topic_ids":["CAT:T02.06"],"confidence":"Prompt structure is inference. Hailuo statement is a vendor claim.","limitations":["Prompt structure is inference. Hailuo statement is a vendor claim.","Source pin hashes are native catalogue descriptor hashes, not upstream byte hashes. 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