--- ray/src/common/tmprivat.h	2009/02/09 20:48:08	3.19
+++ ray/src/common/tmprivat.h	2010/07/27 16:19:57	3.21
@@ -1,4 +1,4 @@
-/* RCSid $Id: tmprivat.h,v 3.19 2009/02/09 20:48:08 greg Exp $ */
+/* RCSid $Id: tmprivat.h,v 3.21 2010/07/27 16:19:57 greg Exp $ */
 /*
  * Private header file for tone mapping routines.
  */
@@ -32,7 +32,7 @@ extern "C" {
 
 #define BRT2SCALE(l2)	(int)(M_LN2*TM_BRTSCALE*(l2) + ((l2)>0 ? .5 : -.5))
 
-#define HISTEP		8		/* steps in BRTSCALE for each bin */
+#define HISTEP		32		/* steps in BRTSCALE for each bin */
 
 #define MINBRT		(-16*TM_BRTSCALE)	/* minimum usable brightness */
 #define MINLUM		(1.125352e-7)		/* tmLuminance(MINBRT) */
@@ -42,13 +42,9 @@ extern "C" {
 
 #define LMESLOWER	(5.62e-3)		/* lower mesopic limit */
 #define	LMESUPPER	(5.62)			/* upper mesopic limit */
-#if	(TM_BRTSCALE==128)
-#define BMESLOWER	(-663)			/* encoded LMESLOWER */
-#define BMESUPPER	(221)			/* encoded LMESUPPER */
-#else
 #define BMESLOWER	((int)(-5.18*TM_BRTSCALE-.5))
 #define BMESUPPER	((int)(1.73*TM_BRTSCALE+.5))
-#endif
+
 						/* approximate scotopic lum. */
 #define	SCO_rf		0.062
 #define SCO_gf		0.608