box b1 3 3 3
profile p1 x 1 y 1 x -1 y -1
ttranslate p1 1 1 0

featprism b1 p1 p1 0 0 1 1 1
featperformval prism r1 5

profile p2 x 0.5 y 0.5 x -0.5 y -0.5 
ttranslate p2 1.25 1.25 0

featprism r1 p2 p2 0 0 1 1 1
featperformval prism result 7

checkprops result -s 66