TangentDecalUnity

A decal system designed for projecting decals in tangent space (UV space) for use with SkinnedMeshRenderers in Unity.

Features

Use Cases

• Proper decal application for objects that deform through animation.
• Use for representing transparency effects with decals.

Advantages

• Suitable for projection onto deforming renderers, such as SkinnedMeshRenderers and ClothRenderers.
• Since the decal effect is applied as a texture, it allows for flexible expressions, such as changing alpha values using Shader Graph.

Disadvantages

• Each renderer that is a target for decals must be registered individually, and the materials must be independent for each renderer, with correctly set UVs.
• Each decal target is assigned a RenderTexture, and a RenderPass is issued, making the system unsuiable for large-scale applications.

Requirements

• Unity 6 (URP 17)
• Unity 6 (HDRP 17)