public sealed class CubemapArray : Texture

Modern graphics APIs, such as D3D10.1 and later, OpenGL 4.0 and later, and Metal on macOS support cubemap arrays, which are arrays of cubemaps with same size and format. From the shader side, they are treated as a single resource, and sampling them needs an extra coordinate that indicates which array element to sample from.

Typically cubemap arrays are useful for implementing efficient reflection probe, lighting and shadowing systems (all reflection/cookie/shadow cubemaps in a single array).

Cubemap arrays do not have an import pipeline for them, and must be created from code, either at runtime or in editor scripts. Using Graphics.CopyTexture is useful for fast copying of pixel data from regular Cubemap textures into elements of a cubemap array. From editor scripts, a common way of creating serialized cubemap array is to create it, fill with data (either via Graphics.CopyTexture from regular cubemaps, or via CubemapArray.SetPixels or CubemapArray.SetPixels32) and save it as an asset via AssetDatabase.CreateAsset.

Note that not all platforms and GPUs support cubemap arrays. Use SystemInfo.supportsCubemapArrayTextures to check. Also, this class does not support CubemapArray creation with a Crunch compression TextureFormat.