--- ray/doc/notes/compile_switches	2004/01/01 19:31:45	1.2
+++ ray/doc/notes/compile_switches	2005/09/19 11:35:38	1.5
@@ -1,29 +1,15 @@
 Here is a list of compile switches, used to customize Radiance code
 for specific machines and users:
 
--DMC		If set, switches from default low-discrepency sequence
-		sampling to true (pseudorandom) Monte Carlo.  Use if
-		the "brushed" appearance of specular highlights and
-		penumbras bothers you.
-
 -DALIGN=(type)	Alignment type, machine-dependent.  Most RISC
 		architectures align on 8-word boundaries (double).
 		The default alignment type is int.
 
--DSPEED=(MIPS)	Millions of instructions per second for this
-		processor (approximate).  This is used to decide
-		certain unimportant timing issues such as how many
-		rays to trace before checking input in rvu and
-		whether or not to optimize the color table in ximage
-		on 8-bit displays.
-
 -DWFLUSH=(rays)	Override for number of rays before flush in rvu.
 
--DBSD		Operating system has a strong Berkeley flavor, meaning
-		that bcopy() and bzero() are present but maybe memcpy()
-		and memset() are not.  (See common/standard.h for other
-		things this flag affects.)  Also affects certain system
-		calls, such as signal handling and resource tracking.
+-DBSD	Operating system has a strong Berkeley flavor, which
+		affects certain system calls, such as signal handling and
+		resource tracking.
 
 -DSMLMEM	The system has little RAM available, so size hash
 		tables and the like accordingly.  Only allows for
@@ -39,3 +25,11 @@ for specific machines and users:
 		Values greater than 20 use over 4 Kbytes per
 		light source, which can add up to a lot of
 		memory in scenes with many sources.
+
+-DAVGREFL=R	Set the average surface reflectance for the purpose
+		of indirect irradiance calculations to R, where
+		R is a real number in the range (0,1.0).  The
+		default value is 0.50 (50%).  This value indirectly
+		controls the maximum number of ambient bounces,
+		which can never be more than the log of the -ad
+		setting times the log of AVGREFL.