--- ray/src/rt/rcmain.c	2023/04/07 15:00:11	2.30
+++ ray/src/rt/rcmain.c	2024/04/05 16:41:17	2.36
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char	RCSid[] = "$Id: rcmain.c,v 2.30 2023/04/07 15:00:11 greg Exp $";
+static const char	RCSid[] = "$Id: rcmain.c,v 2.36 2024/04/05 16:41:17 greg Exp $";
 #endif
 /*
  *  rcmain.c - main for rtcontrib ray contribution tracer
@@ -55,15 +55,19 @@ char	RCCONTEXT[] = "RC.";		/* our special evaluation c
 
 #if defined(_WIN32) || defined(_WIN64)
 #define RCONTRIB_FEATURES	"Accumulation\nSummation\nRecovery\n" \
-				"ValueContribution\nImmediateIrradiance\n" \
+				"ImmediateIrradiance\n" \
 				"ProgressReporting\nDistanceLimiting\n" \
-				"Outputs=V,W\n"
+				"InputFormats=a,f,d\nOutputFormats=a,f,d,c\n" \
+				"Outputs=V,W\n" \
+				"OutputCS=RGB,spec\n"
 #else
 #define RCONTRIB_FEATURES	"Multiprocessing\n" \
 				"Accumulation\nSummation\nRecovery\n" \
-				"ValueContribution\nImmediateIrradiance\n" \
+				"ImmediateIrradiance\n" \
 				"ProgressReporting\nDistanceLimiting\n" \
-				"Outputs=V,W\n"
+				"InputFormats=a,f,d\nOutputFormats=a,f,d,c\n" \
+				"Outputs=V,W\n" \
+				"OutputCS=RGB,spec\n"
 #endif
 
 static void
@@ -80,8 +84,8 @@ printdefaults(void)			/* print default values to stdou
 	printf("-y %-9d\t\t\t# y resolution\n", yres);
 	printf(lim_dist ? "-ld+\t\t\t\t# limit distance on\n" :
 			"-ld-\t\t\t\t# limit distance off\n");
-	printf("-h%c\t\t\t\t# %s header\n", header ? '+' : '-',
-			header ? "output" : "no");
+	printf(header ? "-h+\t\t\t\t# output header\n" :
+			"-h-\t\t\t\t# no header\n");
 	printf("-f%c%c\t\t\t\t# format input/output = %s/%s\n",
 			inpfmt, outfmt, formstr(inpfmt), formstr(outfmt));
 	printf(erract[WARNING].pf != NULL ?
@@ -285,10 +289,6 @@ main(int argc, char *argv[])
 			check(2,"s");
 			curout = argv[++i];
 			break;
-		case 'c':			/* input rays per output */
-			check(2,"i");
-			accumulate = atoi(argv[++i]);
-			break;
 		case 'r':			/* recover output */
 			check_bool(2,recover);
 			break;
@@ -299,6 +299,10 @@ main(int argc, char *argv[])
 			check(2,"s");
 			set_eparams(prms = argv[++i]);
 			break;
+		case 'c':			/* sample count */
+			check(2,"i");
+			accumulate = atoi(argv[++i]);
+			break;
 		case 'b':			/* bin expression/count */
 			if (argv[i][2] == 'n') {
 				check(3,"s");
@@ -328,6 +332,9 @@ main(int argc, char *argv[])
 		error(USER, "missing required modifier argument");
 					/* override some option settings */
 	override_options();
+					/* set/check spectral sampling */
+	if (setspectrsamp(CNDX, WLPART) < 0)
+		error(USER, "unsupported spectral sampling");
 					/* initialize object types */
 	initotypes();
 					/* initialize urand */