The average prospector works on the surface of the earth with a two dimensional view. A mining claim is measured on the surface based on a given length and width. Geophysical prospectors measure the response of minerals and metals along a line with reference to points along the length of the line and depth. Geophysical survey lines are done parallel to each other and when viewed along their length and from left to right with "depth", and a three dimensional view is made possible.
It's easy to visualize boxes stacked in a cube shape. Each box has a "value".

The boxes are called "voxels".
https://en.wikipedia.org/wiki/Voxel
To better represent a three dimensional ore body using graphics and based on measured geophysical responses, voxels may be given a range of colors from "cool" to "hot" representing a range of values.
During the process of drilling and getting assays on the physical core from drill holes, it becomes possible to construct an accurate three dimensional view.
Smoothing can be used to provide a "rendering" like we have seen in videos in previous posts.
Stick around, there's more!

- Geowizard