So almost all of them take a levelвЂ‹ parameter. Note that virtually every function in OpenGL that deals with a texture's storage assumes that the texture may have mipmaps. Here is a table describing which texture types may have which values (mipmaps, array layers, and faces): Every image of a texture can therefore be uniquely referenced by the face, layer, and level indices. And each array layer has a number of faces. Each mipmap can have a number of array layers.

Another way to think of it is that a texture has a number of mipmap levels. The first index is the mipmap level, the second is the array layer, and the third is the cube map face. Therefore, a texture can be thought of as a three-dimensional array of images. Note that for cubemap array textures, the layer and face are combined into layer-faces. For Cubemap Textures, the face within that array layer and mipmap level.For Array Textures, the array layerвЂ‹ that contains the image.For textures that can have mipmaps, the mipmap levelвЂ‹ that contains the image.Each image in a texture can be uniquely identified by the following numbers, depending on the texture type: Since a texture stores multiple images, it is important to be able to identify a specific image in a texture. Each mipmap level has a separate set of images.

Textures can have mipmaps, which are smaller versions of the same image used to aid in texture sampling and filtering. Each kind of texture has a specific arrangement of images in its storage. A texture's image storage contains one or more images of a certain dimensionality.

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