Upgrading from:

Graphics`ContourPlot3D`

ContourPlot3D and ListContourPlot3D have been added to the built-in Mathematica kernel.

ContourPlot3D has the same syntax as in Graphics`ContourPlot3D`, but uses a different default setting for the Contours option:

Version 5.2 << Graphics`ContourPlot3D`; ContourPlot3D[x^2 + 2 y^2 - z^2, {x, -2, 2}, {y, -2, 2}, {z, -2, 2}]

ListContourPlot3D has the same syntax as in Graphics`ContourPlot3D`:

Version 5.2 data = Table[ x^2 + 2*y^2 + 3*z^2, {z, -1, 1, .25}, {y, -1, 1, .25}, {x, -1, 1, .25}]; ListContourPlot3D[data, Contours -> {1}]

The MeshRange option is replaced by the option DataRange:

Version 5.2 ListContourPlot3D[data, Contours -> {1}, MeshRange -> {{-1, 1}, {-1, 1}, {-1, 1}}]