--- ray/src/rt/ambient.c	2022/03/07 17:52:14	2.112
+++ ray/src/rt/ambient.c	2023/01/27 19:57:08	2.116
@@ -1,4 +1,4 @@
-static const char	RCSid[] = "$Id: ambient.c,v 2.112 2022/03/07 17:52:14 greg Exp $";
+static const char	RCSid[] = "$Id: ambient.c,v 2.116 2023/01/27 19:57:08 greg Exp $";
 /*
  *  ambient.c - routines dealing with ambient (inter-reflected) component.
  *
@@ -22,8 +22,6 @@ static const char	RCSid[] = "$Id: ambient.c,v 2.112 20
 #define	 OCTSCALE	1.0	/* ceil((valid rad.)/(cube size)) */
 #endif
 
-extern char  *shm_boundary;	/* memory sharing boundary */
-
 #ifndef  MAXASET
 #define	 MAXASET	4095	/* maximum number of elements in ambient set */
 #endif
@@ -458,7 +456,7 @@ sumambient(		/* get interpolated ambient value */
 		 */
 		VSUB(ck0, r->rop, av->pos);
 		d = DOT(ck0, uvw[2]);
-		if (d < -minarad*ambacc-.001)
+		if (d < -minarad*ambacc)
 			continue;
 		d /= av->rad[0];
 		delta_t2 = d*d;
@@ -641,6 +639,10 @@ initambfile(		/* initialize ambient file */
 				ambvwt, ambounce, ambacc);
 		fprintf(ambfp, "-ad %d -as %d -ar %d ",
 				ambdiv, ambssamp, ambres);
+		fprintf(ambfp, "-dr %d -ds %g -dt %g -dc %g ", directrelay,
+				srcsizerat, shadthresh, shadcert);
+		fprintf(ambfp, "-ss %g -st %g -lr %d -lw %g ", specjitter,
+				specthresh, maxdepth, minweight);
 		if (octname != NULL)
 			fputs(octname, ambfp);
 		fputc('\n', ambfp);