diff -r 76b7bd51d64a -r 7e258561a690 src/kdtree.cc
--- a/src/kdtree.cc	Mon Dec 03 01:49:23 2007 +0100
+++ b/src/kdtree.cc	Tue Dec 04 08:58:05 2007 +0100
@@ -186,7 +186,6 @@
 	const Float K = 1.4; // constant, K = cost of traversal / cost of ray-triangle intersection
 	Float SAV = 2*(bbox.w()*bbox.h() + bbox.w()*bbox.d() + bbox.h()*bbox.d()); // surface area of node
 	Float cost = SAV * (K + shapes->size()); // initial cost = non-split cost
-	SplitPos *splitpos = NULL;
 	bool leaf = true;
 	BBox lbb = bbox;
 	BBox rbb = bbox;
@@ -203,7 +202,7 @@
 		{
 			leaf = false;
 			cost = splitcost;
-			splitpos = &*spl;
+			split = spl->pos;
 		}
 	}
 
@@ -236,10 +235,6 @@
 	f += 4;
 #endif
 
-	split = splitpos->pos;
-	Float lnum = splitpos->lnum;
-	Float rnum = splitpos->rnum;
-
 	// split this node
 	delete shapes;
 	children = new KdNode[2];
@@ -279,13 +274,13 @@
 					if (split - bbox.L.cell[axis] < bbox.H.cell[axis] - split)
 					{
 						// left subcell is smaller -> if not empty, put shape here
-						if (lnum)
+						if (children[0].shapes->size())
 							children[0].addShape(sh->shape);
 						else
 							children[1].addShape(sh->shape);
 					} else {
 						// right subcell is smaller
-						if (rnum)
+						if (children[1].shapes->size())
 							children[1].addShape(sh->shape);
 						else
 							children[0].addShape(sh->shape);