Decal

The Decal Master Stack material type enables you to author decals that you can project or place into your Scene. The Decal Master Stack material type is similar to the standard Decal Shader, except that you cannot use this version to author decals projected on transparent materials.

Creating a Decal Shader Graph

To create a Decal material in Shader Graph, you can either:

  • Modify an existing Shader Graph.

    1. Open the Shader Graph in the Shader Editor.
    2. In Graph Settings, select the HDRP Target. If there isn't one, go to Active Targets, click the Plus button, and select HDRP.
    3. In the Material drop-down, select Decal.

  • Create a new Shader Graph.

    1. Go to Assets > Create >Shader Graph > HDRP and click Decal Shader Graph.

Contexts

This Master Stack material type has its own set of Graph Settings. Because of the relationship between settings and Blocks, this has consequences on which Blocks are relevant to the Graph. This section contains information on the Blocks this Master Stack material type adds by default, and which Blocks set properties for this Master Stack material type's Graph Settings.

For more information about the relationship between Graph Settings and Blocks, see Contexts and Blocks.

Vertex Context

Default

Property Description Setting Dependency Default Value
Position The object space vertex position per vertex. None CoordinateSpace.Object
Normal The object space vertex normal per vertex. None CoordinateSpace.Object
Tangent The object space vertex tangent per vertex. None CoordinateSpace.Object

Relevant

This Master Stack material type adds all its Vertex Blocks to the Vertex Context by default and has no extra relevant Blocks.

Fragment Context

Default

When you create a new Decal Master Stack, the Fragment Context contains the following Blocks by default:

Property Description Setting Dependency Default Value
Base Color The base color of the material. None Color.grey
Alpha The Material's alpha value. This determines how transparent the material is. The expected range is 0 - 1. None 1.0
Normal Tangent Space The normal, in tangent space, for the material. • Fragment Normal Space set to Tangent CoordinateSpace.Tangent
Normal Alpha The blend factor for the Material’s normals. A decal modifies the normals of the Material the decal projects onto. A value of 0 means that the decal does not affect the normals of the surface it projects onto. A value of 1 means that the decal fully overrides the normals of the surface. • Material set to Decal 1.0
Metallic The material's metallic value. This defines how "metal-like" the surface of your Material is (between 0 and 1). When a surface is more metallic, it reflects the environment more and its albedo color becomes less visible. At full metallic level, the surface color is entirely driven by reflections from the environment. When a surface is less metallic, its albedo color is clearer and any surface reflections are visible on top of the surface color, rather than obscuring it. None 0.0
Ambient Occlusion The material's ambient occlusion. This approximates occlusion for a fragment on a GameObject’s surface that has been cast by details present in the Material but not the mesh geometry. A value of 0 means the fragment is completely occluded and appears black. A value of 1 means the fragment is not occluded at all, and the ambient color does not change. None 1.0
Smoothness The material's smoothness. Every light ray that hits a smooth surface bounces off at predictable and consistent angles. For a perfectly smooth surface that reflects light like a mirror, set this to a value of 1. Less smooth surfaces reflect light over a wider range of angles (because the light hits the bumps in the microsurface), so the reflections have less detail and spread across the surface in a more diffused pattern. None 0.5
MAOS Alpha The opacity of the Metallic, Ambient Occlusion, and Smoothness values. • Material Type set to Decal 1.0
Emission The color of light to emit from this material's surface. Emissive materials appear as a source of light in your scene. None Color.black

Relevant

This Master Stack material type adds all its Fragment Blocks to the Fragment Context by default and has no extra relevant Blocks.

Graph Settings

Surface Options

Setting Description
Affect BaseColor Indicates whether the decal shader affects the base color of materials it is projected or placed on.
Affect Normal Indicates whether the decal shader affects the normals of GameObjects it is projected or placed on. When enabled, the shader uses the Normal Block to override the receiving Material's normals.
Affect Metal Indicates whether the decal shader affects the metallic property of materials it is projected or placed on. When enabled, the shader uses the Metallic Block to override the receiving Material's metallic property.
Affect Ambient Occlusion Indicates whether the decal shader affects the ambient occlusion property of materials it is projected or placed on. When enabled, the shader uses the Ambient Occlusion Block to override the receiving Material's ambient occlusion.
Affect Smoothness Indicates whether the decal shader affects the smoothness property of materials it is projected or placed on. When enabled, the shader uses the Smoothness Block to override the receiving Material's smoothness property.
Affect Emissive Indicates whether the decal shader affects the emission property of materials it is projected or placed on. When enabled, the shader uses the Emission Block to override the receiving Material's emission property. Emissive Materials appear self-illuminated and act as a visible source of light. This property does not work with receiving Materials that are transparent.