--- ray/src/rt/rv2.c	1989/06/07 08:35:26	1.5
+++ ray/src/rt/rv2.c	1989/06/08 17:04:40	1.8
@@ -369,11 +369,11 @@ char  *s;
 			e *= atof(cp);
 	}
 	if (p != NULL) {		/* relative setting */
-		if (intens(p->v) <= FTINY) {
+		if (bright(p->v) <= FTINY) {
 			error(COMMAND, "cannot normalize to zero");
 			return;
 		}
-		e *= 0.5 / intens(p->v);
+		e *= 0.5 / bright(p->v);
 	}
 	if (e <= FTINY || fabs(1.0 - e) <= FTINY)
 		return;
@@ -404,7 +404,7 @@ register char  *s;
 	char  buf[128];
 	
 	if (s[0] == '\0') {
-		(*dev->comout)("aa ab ad ar as av dj dt lr lw sd sp: ");
+		(*dev->comout)("aa ab ad ar as av dj dt lr lw sp st: ");
 		(*dev->comin)(buf);
 		s = buf;
 	}
@@ -555,9 +555,9 @@ register char  *s;
 			psample = i0;
 			pdepth = 0;
 			break;
-		case 'd':			/* difference */
+		case 't':			/* threshold */
 			if (sscanf(s+2, "%lf", &d0) != 1) {
-				sprintf(buf, "sample difference (%.6g): ",
+				sprintf(buf, "sample threshold (%.6g): ",
 						maxdiff);
 				(*dev->comout)(buf);
 				(*dev->comin)(buf);