Prepare materials for projection in the Built-In Render Pipeline

Use a Projector component to create effects such as:

• Decal effects, like bullet holes or paint splatters
• Blob shadows
• Stylized lighting effects
• The effect of a real-world projector, using another CameraA component which creates an image of a particular viewpoint in your scene. The output is either drawn to the screen or captured as a texture. More info
  See in Glossary that renders to a Render TextureA special type of Texture that is created and updated at runtime. To use them, first create a new Render Texture and designate one of your Cameras to render into it. Then you can use the Render Texture in a Material just like a regular Texture. More info
  See in Glossary

Note: This workflow is compatible only with the Built-in Render PipelineA series of operations that take the contents of a Scene, and displays them on a screen. Unity lets you choose from pre-built render pipelines, or write your own. More info
See in Glossary. For similar functionality in other render pipelines, see Decals and projectors.

A Projector works by projecting a material onto all objects that intersect its frustum. The material must use the Projector/Light or Projector/Multiply shadersA program that runs on the GPU. More info
See in Glossary, available in Unity’s Standard Assets.

When configuring a material to use with the Projector/Light and Projector/Multiply shaders, be aware of the following:

Cookie texture:

• Make sure texture wrap mode is set to “Clamp”
• Turn on “Replicate Border” option in mipmap related import settings
• Use uncompressed texture format
• Projector/Shadow also requires alpha channel to be present (typically Alpha from Grayscale option is ok)

Falloff texture (if present):

• Data needs to be in alpha channel, so typically Alpha8 texture format
• Make sure texture wrap mode is set to “Clamp”
• Make sure leftmost pixelThe smallest unit in a computer image. Pixel size depends on your screen resolution. Pixel lighting is calculated at every screen pixel. More info
  See in Glossary column is black; and “Border mipmaps” import setting is on.

Examples

Standard Assets contains example PrefabsAn asset type that allows you to store a GameObject complete with components and properties. The prefab acts as a template from which you can create new object instances in the scene. More info
See in Glossary that demonstrate the use of Projector components.

To use the Prefabs:

1. Download Standard Assets
2. Import StandardAssets > Effects > Projectors into your Project
3. In the Project window, navigate to StandardAssets > Effects > Projectors > Prefabs
4. Drag the one of the Prefabs into your Scene

You can use the Prefab as is in your Project, modify it, or examine it to see how it is configured.