--- ray/src/rt/raytrace.c	2016/03/17 21:53:42	2.70
+++ ray/src/rt/raytrace.c	2016/05/16 17:32:10	2.71
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char RCSid[] = "$Id: raytrace.c,v 2.70 2016/03/17 21:53:42 greg Exp $";
+static const char RCSid[] = "$Id: raytrace.c,v 2.71 2016/05/16 17:32:10 greg Exp $";
 #endif
 /*
  *  raytrace.c - routines for tracing and shading rays.
@@ -199,6 +199,11 @@ raytrans(			/* transmit ray as is */
 }
 
 
+/* Macro for test to see if BSDF material uses proxy */
+#define isBSDFproxy(m)	((m)->otype == MAT_BSDF && (m)->oargs.nsargs && \
+				strcmp((m)->oargs.sarg[0], "0"))
+
+
 int
 rayshade(		/* shade ray r with material mod */
 	RAY  *r,
@@ -207,7 +212,7 @@ rayshade(		/* shade ray r with material mod */
 {
 	OBJREC  *m;
 
-	r->rt = r->rot;			/* set effective ray length */
+	r->rt = r->rot;			/* preset effective ray length */
 	for ( ; mod != OVOID; mod = m->omod) {
 		m = objptr(mod);
 		/****** unnecessary test since modifier() is always called
@@ -218,8 +223,9 @@ rayshade(		/* shade ray r with material mod */
 		******/
 					/* hack for irradiance calculation */
 		if (do_irrad && !(r->crtype & ~(PRIMARY|TRANS)) &&
+				(ofun[m->otype].flags & (T_M|T_X)) &&
 				m->otype != MAT_CLIP &&
-				(ofun[m->otype].flags & (T_M|T_X))) {
+				!isBSDFproxy(m)) {
 			if (irr_ignore(m->otype)) {
 				raytrans(r);
 				return(1);