--- title: How to Build Realistic AI Perception and Memory in Unity description: A tutorial on building a realistic AI perception and memory system in Unity, inspired by Game AI Pro. Instead of giving AI agents instant knowledge of player... canonical: https://daily.dev/posts/how-to-build-realistic-ai-perception-and-memory-in-unity-ukxsi3qfi twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: How to Build Realistic AI Perception and Memory in Unity | daily.dev og:description: A tutorial on building a realistic AI perception and memory system in Unity, inspired by Game AI Pro. Instead of giving AI agents instant knowledge of player... og:url: https://daily.dev/posts/how-to-build-realistic-ai-perception-and-memory-in-unity-ukxsi3qfi og:image: https://api.daily.dev/og/posts/ukxsI3qfI.png og:image:alt: How to Build Realistic AI Perception and Memory in Unity og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # How to Build Realistic AI Perception and Memory in Unity **[git-amend](https://daily.dev/sources/git-amend)** · 16 min read · 0 upvotes · 0 comments ## Summary A tutorial on building a realistic AI perception and memory system in Unity, inspired by Game AI Pro. Instead of giving AI agents instant knowledge of player location, agents rely on limited sight and sound with awareness that builds up and fades over time using an ADSR-style envelope system. The implementation covers core data types (StimType enum, Stim struct), an Envelope class for time-based awareness, a TargetTrack class per perceived target, a central PerceptionHub for distributing stimuli, a PerceptionAgent component with configurable field-of-view cones and audio radii, and a StimEmitter component on the player that converts movement speed into audio stimuli. The result is agents that turn yellow when suspicious, red when on high alert, and gradually return to idle when they lose track of the player. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Recreating the Late-'90s Console Shooter Enemy AI for an FPS](https://daily.dev/posts/recreating-the-late--90s-console-shooter-enemy-ai-for-an-fps-lqae7mwsw) · 80 LEVEL · 0 upvotes · 0 comments --- Tags: [#c#](https://daily.dev/tags/c#), [#unity](https://daily.dev/tags/unity) [View this post on daily.dev](https://daily.dev/posts/how-to-build-realistic-ai-perception-and-memory-in-unity-ukxsi3qfi) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"How to Build Realistic AI Perception and Memory in Unity","url":"https://daily.dev/posts/how-to-build-realistic-ai-perception-and-memory-in-unity-ukxsi3qfi","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/how-to-build-realistic-ai-perception-and-memory-in-unity-ukxsi3qfi"},"datePublished":"2026-07-19T07:59:00.362Z","dateModified":"2026-07-19T09:46:30.992Z","description":"A tutorial on building a realistic AI perception and memory system in Unity, inspired by Game AI Pro. 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