--- ray/src/rt/rpict.c	2009/05/11 21:46:31	2.81
+++ ray/src/rt/rpict.c	2010/09/03 21:16:50	2.83
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char RCSid[] = "$Id: rpict.c,v 2.81 2009/05/11 21:46:31 greg Exp $";
+static const char RCSid[] = "$Id: rpict.c,v 2.83 2010/09/03 21:16:50 greg Exp $";
 #endif
 /*
  *  rpict.c - routines and variables for picture generation.
@@ -51,7 +51,6 @@ int  dimlist[MAXDIM];			/* sampling dimensions */
 int  ndims = 0;				/* number of sampling dimensions */
 int  samplendx;				/* sample index number */
 
-//extern void  ambnotify();
 void  (*addobjnotify[])() = {ambnotify, NULL};
 
 VIEW  ourview = STDVIEW;		/* view parameters */
@@ -119,10 +118,6 @@ int  hres, vres;			/* resolution for this frame */
 
 static VIEW	lastview;		/* the previous view input */
 
-//extern char  *mktemp();  /* XXX should be in stdlib.h or unistd.h */
-
-//double	pixvalue();
-
 static void report(int);
 static int nextview(FILE *fp);
 static void render(char *zfile, char *oldfile);
@@ -701,8 +696,8 @@ pixvalue(		/* compute pixel value */
 	if (dblur > FTINY && vdist > FTINY) {
 		double  vc, dfh, dfv;
 						/* square/circle conv. */
-		dfh = vc = frandom();
-		dfv = frandom();
+		dfh = vc = 1. - 2.*frandom();
+		dfv = 1. - 2.*frandom();
 		dfh *= .5*dblur*sqrt(1. - .5*dfv*dfv);
 		dfv *= .5*dblur*sqrt(1. - .5*vc*vc);
 		if (ourview.type == VT_PER || ourview.type == VT_PAR) {