POV completed 2022-01-11

pngtopnm *.png | ./pnmwindshieldwiper | pnmscale -height 144 | ./pnmtorle > test-transparent_FC_POV_data.h
 scale = 0.034509  height = 20.627600 flags = a  60325 bytes
pngtopnm *.png | ./pnmwindshieldwiper | pnmscale -height 144 | ./pgmtorle > test-transparent_SC_POV_data.h
 scale = 0.034509  height = 20.627600 flags = a  32844 bytes
pngtopnm *.png | ./pnmwindshieldwiper | pnmscale -height 144 | pnmtopng > test-transparent_preview.png
usage:  pngtopnm [-verbose] [-alpha | -mix] [-background color] ...
             ... [-gamma value] [-text file] [-time] [pngfile]
 scale = 201050263905634965063595248128807002721845661138944.000000  height = 20.000000 flags = 0 pnmtopng: 1 colors found