Virtual worlds like Google Earth or NASA WorldWind do not show subsurface features with negative elevation. This projects aims to be a proof-of-concept for how such a system would use opacity and translucency rendered in a virtual world to accommodate negatively elevated features. NASA WorldWind is an open source Java project and is the perfect candidate for this project. Specifically one or two data sets of different scales and regional extents that have negative elevation values will be taken and plotted in the subsurface. The algorithm will continuously modify the opacity of the surface in order to distinguish these features clearly.