Progressive multi-stage dirt and blood cleaning system for URP. Features organic wash channels, cellular sludge textures, zero-artifact Multiply decals, and mop/water mechanics.Multi-Stage Dirt Cleaning is a production-ready, progressive decal washing and dirt removal system designed for the Universal Render Pipeline (URP).This system provides organic multi-stage wash channels, cellular sludge textures, and physical Multiply floor blending that preserves the surface texture beneath the decal.KEY HIGHLIGHTS:• Progressive Multi-Stage Cleaning:- Stage 0 (Intact): Solid, viscous blood and dirt footprint.- Stage 1 (Initial Strike): Organic wash channels, clumpy cellular sludge texture, smooth gradient edges, and washed peripheral splatters.- Stage 2 (Dilution & Serum): Expanded wash channels, higher transparency, diluted serum margins, and liquefied remaining dirt.- Gradual Spot Emergence (Hits > 3): Extra strikes smoothly blend textures via shader interpolation, carving out wash channels incrementally rather than abruptly jumping stages.- Final Stage (Cleaned): Completely disappears with optional cleanup VFX particles and fires the OnFullyCleaned UnityEvent.• Zero-Artifact Multiply Decal Shader:Preserves underlying floor tiles, grout lines, concrete pores, and metallic surfaces without harsh alpha cutoffs or artificial gray film.• Directional Macro Patterns:Includes 4 distinct organic sweep directions (Center-Top, Left Flank, Right Flank, Bottom Sweep). Built-in spatial hashing automatically gives adjacent puddles in a room different wash pattern directions.• Ready-To-Use Demo Scene:Includes a fully playable first-person test chamber with an animated mop viewmodel (forward jab thrust into the crosshair), dual-input FPS camera, and an interactive runtime calibration panel with per-section reset buttons.Package Contents & Technical Specifications:• Shaders:- 1 Custom URP Multiply Decal Shader (MultiStageDirtMultiply.shader) with real-time stage transition blending.• Textures:- 9 Baked high-resolution progressive stage textures (Stage 0, Stage 1 A-D, Stage 2 A-D).• Prefabs & Meshes:- 1 CleanablePuddle_Blood prefab with pre-configured colliders, materials, and pattern variants.- 1 Custom Quad Mesh optimized for zero-artifact floor projection.• Scripts:- Core: CleanablePuddle.cs, ICleanable.cs, PuddleStageVariant.cs- Editor: CleanablePuddleEditor.cs (with in-editor Simulate Hit and Reset Dirt testing buttons)- Demo: DemoMopCleaner.cs, CleaningDemoUI.cs, DemoSimpleFPSCamera.cs- 2 Assembly Definitions (MultiStageDirtCleaning.asmdef & MultiStageDirtCleaning.Editor.asmdef)• Performance:- Zero garbage collection (GC) allocations in update loops.- MaterialPropertyBlock-driven texture swapping and blending.• Compatibility:- Render Pipeline: Universal Render Pipeline (URP).- Unity Versions: Unity 2022.3 LTS, Unity 2023, Unity 6+.- Input: Compatible with both New Input System and Legacy Input Manager.- Documentation: Includes Quick Start README.md and HTML documentation guide.AI tools were used to assist in the initial concept generation of the base dirt and blood texture masks, as well as code structuring and documentation drafting. All texture assets were manually retouched, post-processed, formatted with alpha channels, and integrated into custom URP shaders by the author. All HLSL shader passes, C# runtime logic, custom Inspector tooling, and demo scene mechanics were developed, tested, and calibrated manually within the Unity Editor.
