--- ray/src/rt/rpict.c	1990/03/27 11:40:07	1.20
+++ ray/src/rt/rpict.c	1990/10/13 21:32:25	1.22
@@ -235,7 +235,6 @@ int  xres, y, ysize;
 	COLOR  vline[MAXDIV+1];
 	float  zline[MAXDIV+1];
 	int  b = ysize;
-	double  z;
 	register int  i, j;
 	
 	for (i = 0; i < xres; i++) {
@@ -321,8 +320,11 @@ int  x, y;			/* pixel position */
 {
 	static RAY  thisray;	/* our ray for this pixel */
 
-	viewray(thisray.rorg, thisray.rdir, &ourview,
-			(x+pixjitter())/hresolu, (y+pixjitter())/vresolu);
+	if (viewray(thisray.rorg, thisray.rdir, &ourview,
+			(x+pixjitter())/hresolu, (y+pixjitter())/vresolu) < 0) {
+		setcolor(col, 0.0, 0.0, 0.0);
+		return(0.0);
+	}
 
 	rayorigin(&thisray, NULL, PRIMARY, 1.0);