--- ray/src/rt/srcsupp.c	1991/11/12 17:10:22	2.1
+++ ray/src/rt/srcsupp.c	1992/01/15 16:54:50	2.3
@@ -1,4 +1,4 @@
-/* Copyright (c) 1991 Regents of the University of California */
+/* Copyright (c) 1992 Regents of the University of California */
 
 #ifndef lint
 static char SCCSid[] = "$SunId$ LBL";
@@ -535,16 +535,25 @@ register RAY  *r;
 #define  distglow(m, r)		(m->otype==MAT_GLOW && \
 				r->rot > m->oargs.farg[3])
 
-/* badambient *
+/* badcomponent *
  *
- * We must avoid including counting light sources in the ambient calculation,
+ * We must avoid counting light sources in the ambient calculation,
  * since the direct component is handled separately.  Therefore, any
  * ambient ray which hits an active light source must be discarded.
+ * The same is true for stray specular samples, since the specular
+ * contribution from light sources is calculated separately.
  */
 
-#define  badambient(m, r)	((r->crtype&(AMBIENT|SHADOW))==AMBIENT && \
-				!distglow(m, r))
+#define  badcomponent(m, r)	(r->crtype&(AMBIENT|SPECULAR) && \
+				!(r->crtype&SHADOW || distglow(m, r)))
 
+/* overcount *
+ *
+ * All overcounting possibilities are contained here.
+ */
+
+#define  overcount(m, r)	(badcomponent(m,r) || wrongsource(m,r))
+
 /* passillum *
  *
  * An illum passes to another material type when we didn't hit it
@@ -570,7 +579,7 @@ register OBJREC  *m;
 register RAY  *r;
 {
 						/* check for over-counting */
-	if (wrongsource(m, r) || badambient(m, r))
+	if (overcount(m, r))
 		return;
 						/* check for passed illum */
 	if (passillum(m, r)) {