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A texture array is a collection of same size/format/flags 2D textures that look like a single object to the GPU, and can be sampled in the shaderA program that runs on the GPU. More info
See in Glossary with a texture element index. They are useful for implementing custom terrainThe landscape in your scene. A Terrain GameObject adds a large flat plane to your scene and you can use the Terrain’s Inspector window to create a detailed landscape. More info
See in Glossary renderingThe process of drawing graphics to the screen (or to a render texture). By default, the main camera in Unity renders its view to the screen. More info
See in Glossary systems or other special effects where you need an efficient way of accessing many textures of the same size and format. Elements of a 2D texture array are also known as slices, or layers.
Texture arrays need to be supported by the underlying graphics API and the GPU. They are available on:
Other platforms do not support texture arrays (OpenGL ES 2.0 or WebGL 1.0). Use SystemInfo.supports2DArrayTextures to determine texture array support at runtime.
You can import texture arrays from source texture files that are divided into cells. These are called flipbook textures. To do this:
For more information, see Texture import settings.
To create a texture array from a C# script, use the Texture2DArray class to initialize the texture and set 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 data, and save the object as an asset file using AssetDatabase.CreateAsset.
Texture array elements may also be used as render targets. Use RenderTexture.dimension to specify in advance whether the render target is to be a 2D texture array. The depthSlice argument to Graphics.SetRenderTarget specifies which mipmap level or cube map face to render to. On platforms that support “layered rendering” (i.e. geometry shaders), you can set the depthSlice argument to –1 to set the whole texture array as a render target. You can also use a geometry shader to render into individual elements.