Projector

A Projector allows you to project a Material onto all objects that intersect its frustum. The Material must use the Projector/Light or Projector/Multiply shaders, available in Unity’s Standard Assets.

You can use a Projector to create:

1. Blob shadows
2. Bullet holes, or similar effects
3. The effect of a real-world projector, using another Camera that is rendering to a Render Texture
4. Stylized lighting effects

The Projector and render pipelines

The Projector component is only compatible with the Built-in Render Pipeline and the availability of a alternative solution depends on which render pipeline you are using.

Using the Projector component

Standard Assets contains example Prefabs 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.

Component properties

Material configuration

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 “Border Mipmaps” option in 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 pixel column is black; and “Border mipmaps” import setting is on.