Does HoloDraw replace GMT?
No. Although you can generate some images using HoloDraw alone, HoloDraw programs are designed to accept the output from GMT programs. For example, use the GMT program “pscoast” to plot a coastline, then use the HoloDraw program “linedraw.pl” to convert the coastline data to HoloDraw format for viewing in 3D. Or, use GMT programs like “blockmean”, “surface”, “grdsample” and “grd2xyz” to create a surface, then use the HoloDraw program “surfdraw.pl” to plot the surface in VRML.