# Original bug : BUC40188
# Date : 20mar98

box mb -0.5 -0.5 -0.5 1 1 1 
explode mb F 

prism pryz mb_1 1 0 0 SemiInf
box ab 0 -1 -1 2 2 2

#pkv f
# do not try to obtain valid [Semi]Infinite solid.
# It will be not closed by the definition
#bcut result ab pryz 
bcut result ab pryz 
#pkv t

set square 30