--- ray/src/rt/rview.c	1989/02/02 10:41:39	1.1
+++ ray/src/rt/rview.c	1989/06/07 08:35:29	1.2
@@ -28,6 +28,7 @@ double  maxdiff = .15;			/* max. sample difference */
 double  exposure = 1.0;			/* exposure for scene */
 
 double  dstrsrc = 0.0;			/* square source distribution */
+double  shadthresh = .05;		/* shadow threshold */
 
 int  maxdepth = 4;			/* maximum recursion depth */
 double  minweight = 1e-2;		/* minimum ray weight */