OCCT

puts "========"
puts "Consider ZLayer properties while sorting list of picked entities"
puts "========"

pload MODELING VISUALIZATION

box b1 0 0 0 2 3 4
box b2 0 0 0 1 1 2
vertex v 100 -300 0

vclear
vinit View1
catch { vzlayer del 1 }
set aLayerId [vzlayer add]
vzlayer ${aLayerId} -enable depthClear
vaxo
vdisplay -noupdate -dispMode 1 -highMode 1 b1
vdisplay -noupdate -dispMode 1 -highMode 1 -layer ${aLayerId} b2
vsetcolor -noupdate b1 RED
vsetcolor -noupdate b2 GREEN
vfit
vrotate 0.1 0 0
vmoveto 100 300
vstate
vselect 100 300
vmoveto 0 0

set aSelColor [vreadpixel 100 300 rgb name]
if { $aSelColor != "GRAY76"} { puts "Error: wrong object has been selected" }

vdisplay -dispMode 0 -osd -2d -trsfPersPos -1 1 v

vdump $imagedir/${casename}.png