set pm3d depth lighting 
set object rect from sc 0,0 to sc 1,1 behind fc "#114400"
set palette function  1, 0.1+0.2*gray*rand(0), 0.2
set samples 96
set isosamples 128
unset border
unset tics
unset colorbox
unset key
set xyplane 0
set view 60,30, 1.5, 
set term pngcairo size 360,360
set out "apple.png"
set parametric
set urange [0:2*pi]
set vrange [-pi:pi]
x(u,v) = (4+3.8*cos(v)) * cos(u)
y(u,v) = (4+3.8*cos(v)) * sin(u)
z(u,v) = (cos(v)+sin(v)-1)*(1+sin(v))*log(1-pi*v/10) + 7.5*sin(v)

splot x(u,v), y(u,v), z(u,v) w pm3d
!display "apple.png"