--- ray/src/rt/otspecial.h	2003/06/27 06:53:22	2.5
+++ ray/src/rt/otspecial.h	2018/01/09 05:01:15	2.8
@@ -1,4 +1,4 @@
-/* RCSid $Id: otspecial.h,v 2.5 2003/06/27 06:53:22 greg Exp $ */
+/* RCSid $Id: otspecial.h,v 2.8 2018/01/09 05:01:15 greg Exp $ */
 /*
  * Special type flags for objects used in rendering.
  * Depends on definitions in otypes.h
@@ -9,11 +9,19 @@
 extern "C" {
 #endif
 
-		/* flag for materials to ignore during irradiance comp. */
-#define  T_IRR_IGN	T_SP1
+		/* flag for nominally transparent materials */
+#define  T_TRANSP	T_SP1
 
-#define  irr_ignore(t)	(ofun[t].flags & T_IRR_IGN)
+		/* flag for completely opaque materials */
+#define  T_OPAQUE       T_SP2
 
+#define  istransp(t)	(ofun[t].flags & T_TRANSP)
+
+#define  isopaque(t)    (ofun[t].flags & T_OPAQUE)
+
+		/* test if we have a BSDF proxy surface */
+#define isBSDFproxy(m)	((m)->otype == MAT_BSDF && (m)->oargs.nsargs && \
+				strcmp((m)->oargs.sarg[0], "0"))
 
 #ifdef __cplusplus
 }