{"observation":{"id":"5f048dbe-f49b-4bb0-a108-0a2511c1f675","tool":"descript","tool_name":"Descript","criterion":"lighting-adaptation","criterion_name":"Lighting adaptation","criterion_definition":"Does the replaced background look naturally lit relative to the subject, or obviously composited?","criterion_evidence_type":"transformation","criterion_rank_role":"decisive","criterion_rank_role_reason":"If the replaced background does not match the subject’s lighting, the composite looks fake, so this is central to replacement quality. (3 of 3 judges)","scenario":"oregon-coast-walking","scenario_name":"Oregon Coast Walking","group_tag":"remove-or-replace-video-backgrounds-using-ai","scenario_description":"A daylight outdoor video of a single person walking along an Oregon coast beach, with the camera following the subject and ocean waves, sand, and sky visible in the background. It was used to test background removal and replacement on a moving subject in a natural outdoor setting.","modality":"video","input_text":null,"input_artifact_refs":[{"alt":null,"url":"https://d3epheqghktydj.cloudfront.net/remove-or-replace-video-backgrounds-usin-input-1-0263564d1ef2.mp4","role":"input","filename":"Input 1.mp4"}],"stresses":["Outdoor background removal","Subject segmentation during movement","Hair and edge preservation","AI background replacement quality"],"verdict":"struggled","score":null,"score_total":null,"note":"The replacement background does not integrate lighting naturally: the subject’s rim light points from behind/above while the scene’s sun sits upper-left near the horizon, creating a direction mismatch.","evidence_state":"verified","source":null,"artifacts":[{"url":"https://cdn.futuresmart.ai/public/aidemos/7114952d583d4b62942705d6322ac2aa.png?v=1","role":"output","alt":null}],"run_id":"10155228-7ce8-438a-a210-547331ef080b","study_title":"Remove or Replace Video Backgrounds Using AI","study_kind":"generation","research_task":"86ba42c2d","tested_at":null,"completeness":"input-and-output","input":{"state":"files","text":null,"files":[{"url":"https://d3epheqghktydj.cloudfront.net/remove-or-replace-video-backgrounds-usin-input-1-0263564d1ef2.mp4","filename":"Input 1.mp4","alt":"Oregon Coast Walking","role":"input"}],"modality":"video","stresses":["Outdoor background removal","Subject segmentation during movement","Hair and edge preservation","AI background replacement quality"]},"tool_page_slug":"descript","tool_url":"https://aidemos.com/tools/descript","permalink":"https://aidemos.com/evidence/5f048dbe-f49b-4bb0-a108-0a2511c1f675","api_url":"https://ai.aidemos.com/v1/observations/5f048dbe-f49b-4bb0-a108-0a2511c1f675"},"peers":[{"id":"3a6106c1-f519-470f-ad9d-7d5125b936f6","tool":"invideo-ai","tool_name":"InVideo AI","verdict":"struggled","score":null,"score_total":null,"note":"A requested sunset look was rendered as a warmer color grade on the same midday sun position; the sun disc stayed the same size, brightness, and height in frame instead of moving to a low-horizon lighting setup.","artifact_count":2,"thumbnail":"https://cdn.futuresmart.ai/public/aidemos/9805ddf9c2084177812beaf9b1706548.png?v=1","evidence_url":"https://aidemos.com/evidence/3a6106c1-f519-470f-ad9d-7d5125b936f6"}],"other_criteria":[{"id":"74bae4c9-d90a-46bb-bd37-1e54aeddf263","criterion":"edge-quality","criterion_name":"Edge quality","rank_role":"decisive","verdict":"struggled","score":null,"score_total":null,"note":"The cutout shows a visible cyan-blue halo around the backlit head and shoulders, so the edge is not a clean silhouette.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/74bae4c9-d90a-46bb-bd37-1e54aeddf263"},{"id":"1f7967d5-28c4-44e9-8ef0-d9546946a176","criterion":"output-resolution","criterion_name":"Output resolution","rank_role":"context","verdict":"failed","score":null,"score_total":null,"note":"It downscales a 2160×3840 source to a 720×1280 export instead of preserving the original resolution.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/1f7967d5-28c4-44e9-8ef0-d9546946a176"}],"appears_in":[{"page_type":"ranking","slug":"video-background-removers","title":"Best AI Tools to Remove or Replace Video Backgrounds with AI","url":"https://aidemos.com/best/video-background-removers","binding":"run"}],"same_scenario":[{"id":"3a6106c1-f519-470f-ad9d-7d5125b936f6","tool":"invideo-ai","tool_name":"InVideo AI","verdict":"struggled","score":null,"score_total":null,"note":"A requested sunset look was rendered as a warmer color grade on the same midday sun position; the sun disc stayed the same size, brightness, and height in frame instead of moving to a low-horizon lighting setup."}]}