We will make a perspective, color-coded view of the US Rockies from the southeast. This is done using
grdview us.grd -JM6i -E135/35 -Qi50 -Ius_i.grd -Ctopo.cpt -V -B2 \ -JZ0.5i >! view.ps
This plot is pretty crude since we selected 50 dpi but it is fast to render and allows us to try alternate values for vantage point and scaling. When we settle on the final values we select the appropriate dpi for the final output device and let it rip.