Projector component

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 Camera that renders to a Render Texture

Note: This workflow is compatible only with the Built-in Render Pipelne. For similar functionality in other render pipelines, see Decals and projectors.

Using the Projector component

A Projector works by projecting 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.

Material configuration

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

剪影纹理：

• 确保纹理包裹模式设置为“Clamp”
• Turn on “Replicate Border” option in mipmap related import settings
• 使用未压缩的纹理格式
• Projector/Shadow 还要求存在 Alpha 通道（通常可以使用 Alpha from Grayscale 选项）

衰减纹理（如果存在）：

• 数据需要在 Alpha 通道中，因此通常为 Alpha8 纹理格式
• 确保纹理包裹模式设置为“Clamp”
• 确保最左边的像素列为黑色；并且“Border mipmaps”导入设置处于启用状态。

示例

标准资源 (Standard Assets) 包含的示例预制件演示了 Projector 组件的使用。

要使用预制件，请执行以下操作：

1. 下载 Standard Assets
2. 将 StandardAssets > Effects > Projectors 导入到项目中
3. 在 Project 窗口中，导航到 StandardAssets > Effects > Projectors > Prefabs
4. 将一个预制件拖入场景中

可以按原样使用预制件，对预制件进行修改，或检查预制件的配置。

Projector Inspector reference