I have the following building model:

merge
{
	intersection
	{
		plane {+x + y,0 translate +y * 3/4}
		plane {-x + y,0 translate +y * 3/4}
		box {-1,+1}
		translate	+y
		scale		1/2
	}
	box {<0,0,0,>,<+1/8,+1/1,+1/8,>}
	clipped_by
	{
		box {<-1/8,+0/1,-1,>,<+1/8,+1/4,+1/1,>}
	}
	hollow
	pigment {color rgbt <1,0,0,0>}
}

However, the clipped_by does not seem to be working. Instead of the 
clipped part being removed, it is retained and everything else is 
removed. Am I using the clipped_by statement wrong? Thanks.

Mike

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