Since these days a painted relief for Clark County is available in the Las Vegas demo project. The initial DEM (digital elevation model) came from Kepner, W. G., T.D. Sajwaj, D. F. Bradford, and E. J. Evanson. 2005. Nevada Geospatial Data Browser. EPA/600/C-05/005. U.S. Environmental Protection Agency, Office of Research and Development, Las Vegas, NV.
This one is available to the scale range 1:150.000 and the only adjustment what was done in the Style Editor of GMSC is the definition of the transparaent color (in this case black). Furthermore you will find the raster in the theme named Hillshade in the legend of GMSC. The relief is also visible in the Overview window at every start of the project.