Unity Layer

Unity Layer is a concept in the Unity game engine that allows developers to group objects in the game world into different layers, each with its own properties and behaviors. Layers are useful for managing collisions, setting up cameras, and controlling which objects are visible to the player.

In Unity, layers are represented by integer values, with each layer assigned a unique integer. By default, Unity has 32 layers available, but this can be increased if needed. Objects can be assigned to a layer by setting their layer property in the inspector. This allows developers to control which objects interact with each other, which objects are visible to the camera, and which objects can be targeted by raycasts.

Layers are also useful for optimizing performance. By grouping objects into layers, developers can apply different culling techniques to each layer, such as occlusion culling or distance culling. This can help to reduce the number of objects that are rendered or updated each frame, improving performance and reducing the load on the CPU and GPU.