{"schemaVersion":1,"record":{"key":"mechanic/game-mechanics--gm-blood-decals","type":"mechanic","id":"game-mechanics--gm-blood-decals","lang":"en","title":"Blood decals","summary":"A hit leaves a blood mark on a wall or floor. The mark preserves evidence of the event after immediate effects disappear.","updatedAt":"2026-10-22","status":"active","url":"https://gamemechanics.pro/en/knowledge/mechanic/game-mechanics--gm-blood-decals/","jsonUrl":"https://gamemechanics.pro/api/v1/knowledge/en/mechanic/game-mechanics--gm-blood-decals.json","markdownUrl":"https://gamemechanics.pro/content/knowledge/en/mechanic/game-mechanics--gm-blood-decals.md","aliases":[],"tags":["Game design techniques","Visual feedback","Gunplay","Environmental traces","Blood","Satisfying"],"sourceIds":["source-d54f4244c6567bb1","source-6b4f0101e17f0220","source-267b4f906c12b9fb","source-eb14201275747a19","source-50f75a4c65dfa543","source-5e512195bcac7898"],"sources":[{"id":"source-d54f4244c6567bb1","title":"Game Mechanics: Blood decals","url":"https://gamemechanics.org/patterns/blood-decals","verifiedAt":null},{"id":"source-6b4f0101e17f0220","title":"Wolfenstein 3D (1992)","url":"https://gamemechanics.org/patterns/blood-decals/game/wolfenstein-3d","verifiedAt":null},{"id":"source-267b4f906c12b9fb","title":"Return to Castle Wolfenstein (2001)","url":"https://gamemechanics.org/patterns/blood-decals/game/return-to-castle-wolfenstein","verifiedAt":null},{"id":"source-eb14201275747a19","title":"Doom 3 (2004)","url":"https://gamemechanics.org/patterns/blood-decals/game/doom-3","verifiedAt":null},{"id":"source-50f75a4c65dfa543","title":"Far Cry 5 (2018)","url":"https://gamemechanics.org/patterns/blood-decals/game/far-cry-5","verifiedAt":null},{"id":"source-5e512195bcac7898","title":"RoboCop: Rogue City (2023)","url":"https://gamemechanics.org/patterns/blood-decals/game/robocop-rogue-city","verifiedAt":null}],"sections":[{"id":"principle","title":"How it works","body":"Hits leave blood marks projected onto surrounding surfaces."},{"id":"variants","title":"Variants","body":"### How the technique works\n\n<a id=\"gm-blood-decals-rule\"></a>\n\n- Hits leave blood marks projected onto surrounding surfaces. <a id=\"gm-blood-decals-definition\"></a>"},{"id":"context","title":"Context and limits","body":"All 199 Game Mechanics entries at the check date: player actions, systems, presentation techniques and contested patterns. Entries are grouped by their first source-card category; all categories appear in their descriptions. Definitions use original wording. References link to game-specific galleries; images and videos remain at the source."}],"relations":[],"placements":[{"catalogId":"game-mechanics","id":"gm-blood-decals","title":"Game design techniques","url":"https://gamemechanics.pro/en/mechanics/game-mechanics/#gm-blood-decals","categoryIds":["gm-category-gunplay","gm-category-blood","gm-category-satisfying","gm-category-environmental-traces","gm-category-visual-feedback"]}],"supersededBy":[],"attributes":{"preview":{"updatedAt":"2026-10-22","title":"Blood decals","description":"A hit leaves a blood mark on a wall or floor. The mark preserves evidence of the event after immediate effects disappear.","image":{"src":"images/mechanics/interaction-blood-decals.webp","width":498,"height":276,"game":"Far Cry 5","sourceUrl":"https://gamemechanics.org/patterns/blood-decals","originalUrl":"https://cdn.gamemechanics.org/webm/far_cry_5_blood_decal.webm","sourceFrameSeconds":2.68,"credit":"Ubisoft Montréal; frame from clip via GameMechanics.org","rights":"Game imagery © its respective rights holders. Source host: GameMechanics.org. Visible source watermarks preserved. All rights reserved; excluded from MIT and CC BY 4.0.","caption":"A mark remains on the wall behind the target","alt":"A blood mark remains on a shop’s pale wall after an enemy falls in Far Cry 5.","markers":[{"x":53,"y":39,"label":"Persistent mark on the wall"},{"x":57,"y":75,"label":"Position of the fallen enemy"}]},"tips":["Limit decal count and lifetime to preserve scene readability.","Check attachment to moving and destructible surfaces."],"examples":[{"title":"Far Cry 5","url":"https://gamemechanics.org/patterns/blood-decals"}]}},"endsAt":null,"provenance":"Editorial reference index based on the 199 public Game Mechanics pattern pages checked on 2026-10-20. Original concise RU/EN definitions by gamemechanics.pro; pattern names, category associations and game-reference URLs retained from gamemechanics.org. The source gallery includes a film analogy. Linked materials retain their original rights; references are upstream attributions, not independent verification.","license":"CC-BY-4.0","codeLicense":"MIT","attribution":"gamemechanics.pro contributors","catalogKey":"catalog/game-mechanics"}}