set pm3d depth lighting primary 0.4
set object rect from sc 0,0 to sc 1,1 behind fc "#005566"
set palette defined (0 "#999999", 1 "#000000")
unset border
unset tics
unset colorbox
unset key
set xyplane 0
set view 40,210,1.8, 0.4
set term pngcairo size 360,360
set out "whale.png"
set xrange [-0:7.5]
set yrange [-4:3.5]

splot "whale.dat" w pm3d
!display whale.png