DECAL COLLIDER – Ultimate Runtime Mesh & Collision Decals

Decal Collider is a production-focused Unity tool for creating projected decals that include both a visual mesh and a matching physics collider, with strong support for runtime updates, Sprite/TMP workflows, and Built-in/URP/HDRP pipelines. As projects grow, decal workflows can become fragile: projection gaps, invalid collider meshes, runtime sync issues on animated content, and heavy rebuild costs. Decal Collider gives you a single, clean pipeline to keep decal visuals and physics consistent. ✨ Better visual-to-physics consistency ✨ Safer runtime behavior for complex meshes ✨ Faster iteration (project -> tweak -> rebuild -> test) 🛠️ How It Works - Scans source data (Mesh, SpriteRenderer, or TextMeshPro) - Projects decal geometry onto target surfaces (18+ directions) - Builds procedural decal mesh + matching collider - Applies optional alpha trimming/masking to keep only visible collision areas - Supports runtime/live updates with controlled rebuild frequency - Outputs detailed stats for optimization decisions 🎯 Projection + Collider in One Workflow - Generate visual decal mesh and physics collider together - Local/world projection control with multi-direction support - Triplanar and sphere-friendly projection options 🖼️ Sprite + TextMeshPro Support - Sprite swap/flip aware projection - Dynamic TMP source support with automatic refresh when content changes - Stable source detection during mode switches 🔄 Runtime Update System - Live update interval controls - Async rebuild API support to reduce frame spikes - Runtime-safe refresh path for frequently changing decals 🧬 Projection Mask Logic - Masks empty regions when rays partially hit surfaces - Keeps source fully visible when no hit occurs (void-safe fallback) 🧯 Physics Safety Layer - PhysX 5-safe mesh assignment path - Invalid/zero-volume mesh validation before collider apply - Safe fallback behavior to avoid collider cooking failures 📊 Stats + Analysis - Before/after mesh stats and timing data - Hit ratio and projection diagnostics - Inspector-side analysis for fast tuning 🧩 Performance Controls - Cache-friendly rebuild flow - Optional culling/visibility-based update reductions - Runtime behavior tuned for larger scenes 📚 API + Tooling - Public API for automation/integration - Hit callback hooks for gameplay effects - Editor tooling, presets, quick actions, and example scenes 📋 Requirements - Unity 2022.3 LTS or newer (recommended: Unity 6) - TextMeshPro for TMP-based decal sources - Works in both Editor and Runtime workflows 🌐 Render Pipelines - Built-in RP - URP - HDRP 💻 Supported Platforms - Editor: Windows / macOS / Linux - Runtime Builds: All Unity-supported platforms (PC / Mobile / Console) 🌍 Support & Community - Join our Discord for support, tips, and update announcements. - Full documentation included with a quick-start guide. If Decal Collider improves your workflow, please consider leaving a review.