--- ray/src/rt/rpict.c	1989/02/02 10:41:36	1.1
+++ ray/src/rt/rpict.c	1989/06/07 08:35:21	1.3
@@ -24,11 +24,11 @@ static char SCCSid[] = "$SunId$ LBL";
 VIEW  ourview = STDVIEW(512);		/* view parameters */
 
 int  psample = 4;			/* pixel sample size */
-
 double  maxdiff = .05;			/* max. difference for interpolation */
-
 double  dstrpix = 0.67;			/* square pixel distribution */
+
 double  dstrsrc = 0.0;			/* square source distribution */
+double  shadthresh = .01;		/* shadow threshold */
 
 int  maxdepth = 6;			/* maximum recursion depth */
 double  minweight = 5e-3;		/* minimum ray weight */
@@ -263,6 +263,8 @@ char  *oldfile;
 	getheader(fp, NULL);
 				/* get picture size */
 	if (fscanf(fp, "-Y %d +X %d\n", &y, &x) != 2) {
+		sprintf(errmsg, "bad recover file \"%s\"", oldfile);
+		error(WARNING, errmsg);
 		fclose(fp);
 		return(0);
 	}