// AFM dataset from the hexagonally packed intermediate 
// (Mueller et. al. (1998) FEBS letters 430). 

// load the dataset
load hpi.tiff

// set the scaling in xy-plane and z
.hpi set scalexy=33,scalez=3 // in nanometer !

// create surface (default) object
// using stepsize 4 to decrease size
// and increase speed
.hpi new -name s -set step=4

// create contour object with level-step of 0.1
// (=11 steps from 0 to 1)
.hpi new -name c -type contour -set lstep=0.1,step=4

// color contour object in yellow
.hpi.c set color=yellow

// color surface object by height from
// dark green (0) to light green (1)
.hpi.s set color=dark_green:light_green -range prop=h,val=0:1