box b1 0 0 0 1 1 1
nurbsconvert b1 b1
box b2  0.5   0    -0.5   1     1     0.5

bfuse result  b2 b1

checkprops result -s 9
checkview -display result -2d -otherwise {  b2 b1 } -s -path ${imagedir}/${test_image}.png