#registred alcatraz pictures; r034 was ref. frame because was rightmost (upmost)
#easier to fix left (bottom) edge in registration
#s029reg.ppm # normal lighting ambient
#s030reg.ppm # lit from upper right
#s031reg.ppm # lit from lower right, light going upward

#32,34, and one of 35 or 40

v032reg.ppm 1 0 0 # ***** from left
#s033reg.ppm # from left upward
#s034reg.ppm 1 1 1 # **** from left downward
v035reg.ppm 0 0 1 # *** from stairs
v036reg.ppm 0 0 1 # * from further up stairs
#s037reg.ppm # from upstairs, nice backlightining on bars but very grainy,
###v037regblackened.ppm 0 0 1 # from upstairs, nice backlightining on bars but very grainy
###pork.ppm 0 0 1
#s038reg.ppm # from further up stairs, grainy
#s039reg.ppm 0 0 1 # ** down into stairs, grainy
v040reg.ppm 1 1 0 # ** down into stairs, handle shadow