--- ray/src/px/pinterp.c	2013/05/20 21:52:06	2.45
+++ ray/src/px/pinterp.c	2018/01/24 04:39:52	2.46
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char	RCSid[] = "$Id: pinterp.c,v 2.45 2013/05/20 21:52:06 greg Exp $";
+static const char	RCSid[] = "$Id: pinterp.c,v 2.46 2018/01/24 04:39:52 greg Exp $";
 #endif
 /*
  * Interpolate and extrapolate pictures with different view parameters.
@@ -757,8 +757,7 @@ movepixel(				/* reposition image point */
 		pt[0] += tdir[0]*pos[2];
 		pt[1] += tdir[1]*pos[2];
 		pt[2] += tdir[2]*pos[2];
-		viewloc(pos, &ourview, pt);
-		if (pos[2] <= 0)
+		if (viewloc(pos, &ourview, pt) <= 0)
 			return(0);
 	}
 	if ((pos[0] < 0) | (pos[0] >= 1-FTINY) | (pos[1] < 0) | (pos[1] >= 1-FTINY))