Assembly: Microsoft.Xna.Framework.Graphics (in microsoft.xna.framework.graphics.dll)
A texel represents the smallest unit of a texture that can be read from or written to by the GPU. A texel is composed of 1 to 4 components. Specifically, a texel may be any one of the available texture formats represented in the SurfaceFormat enumeration.
A Texture2D resource contains a 2D grid of texels. Each texel is addressable by a u, v vector. Since it is a texture resource, it may contain mipmap levels. Figure 1 shows a fully populated 2D texture resource.
Figure 1. Texture2D Resource Architecture
This texture resource contains a 5 x 3 texture with three mipmap levels.