If you need to recreate 'lasertest_00.png' ...
there were 3 changes I remember:
laser multiplier from 120 back to 90
comment out one line:
#declare concav_ =
comment out one line:
object { concav_glass1 translate <8.645,2,-10> } // not focused 8.64 r 1.75
thats about all I can think to elaborate on.
