--- ray/src/hd/rhd_x11.c	1997/12/24 14:04:22	3.18
+++ ray/src/hd/rhd_x11.c	1998/01/01 13:00:15	3.20
@@ -18,6 +18,10 @@ static char SCCSid[] = "$SunId$ SGI";
 
 #include  "x11icon.h"
 
+#ifndef RAYQLEN
+#define RAYQLEN		50000		/* max. rays to queue before flush */
+#endif
+
 #ifndef FEQ
 #define FEQ(a,b)	((a)-(b) <= FTINY && (a)-(b) >= -FTINY)
 #endif
@@ -81,9 +85,9 @@ mytmflags()			/* figure out tone mapping flags */
 	for (cp = tail; *cp && *cp != '.'; cp++)
 		;
 	if (cp-tail == 3 && !strncmp(tail, "x11", 3))
-		return(TM_F_CAMERA);
+		return(TM_F_CAMERA|TM_F_NOSTDERR);
 	if (cp-tail == 4 && !strncmp(tail, "x11h", 4))
-		return(TM_F_HUMAN);
+		return(TM_F_HUMAN|TM_F_NOSTDERR);
 	error(USER, "illegal driver name");
 }
 
@@ -278,6 +282,7 @@ int
 dev_flush()			/* flush output */
 {
 	qtUpdate();
+	rayqleft = RAYQLEN;
 	return(XPending(ourdisplay));
 }
 
@@ -453,7 +458,7 @@ draw_grids()			/* draw holodeck section grids */
 	static BYTE	gridrgb[3] = {0x0, 0xff, 0xff};
 	unsigned long  pixel;
 
-	if (!mapped || odev.v.type != VT_PER)
+	if (!mapped)
 		return;
 	if (ncolors > 0)
 		pixel = pixval[get_pixel(gridrgb, xnewcolr)];