Stereo Graphic Images can add depth to 3D plots.
Step 1: An Example Table of Data
Make a table of values like so in excel. Colors are optional.
Step 2: Select and Graph
Select the whole table and make a 3-D surface.
Step 3: Adjust the View
Some viewing adjustments need to made the viewing angle.
Step 4: Make a Second Graph
Reselect the table again place another 3-D surface next to the orginal.
Step 5: This One Needs a Different Angle
This graph will have a slightly different view point.
Step 6: Finished Stereo Graphic Image
Use stereo graphic image viewing techniques to view the 3D image.
May need to scale images to the width between your eyes.
Step 7: Can Display DEM Data
Tables of dem data can display things like the matterhorn in 3D.
Step 8: Here Is the Matterhorn Data
Here is the raw dem data FYI.