Point sampling is the most basic type of texturing. Point sampling takes a single sample (texel) from an area of the texture and uses that as the color value for the pixel. The problem is that it is very inaccurate and can cause a considerable loss of detail. Also, point sampling is just plain ugly by today's standards. Below can be seen a texture and then the point sampled version of the texture. While strongly exaggerated, it demonstrates the general concept.