--- ray/src/rt/rtrace.c	1989/02/02 10:41:37	1.1
+++ ray/src/rt/rtrace.c	1989/06/13 10:57:43	1.5
@@ -35,6 +35,8 @@ int  hresolu = 0;			/* horizontal (scan) size */
 int  vresolu = 0;			/* vertical resolution */
 
 double  dstrsrc = 0.0;			/* square source distribution */
+double  shadthresh = .05;		/* shadow threshold */
+double  shadcert = .5;			/* shadow certainty */
 
 int  maxdepth = 6;			/* maximum recursion depth */
 double  minweight = 4e-3;		/* minimum ray weight */
@@ -73,7 +75,7 @@ char  *fname;
 	long  vcount = hresolu>1 ? hresolu*vresolu : vresolu;
 	long  nextflush = hresolu;
 	FILE  *fp;
-	FVECT  orig, direc, vcol;
+	FVECT  orig, direc;
 					/* set up input */
 	if (fname == NULL)
 		fp = stdin;