--- ray/src/hd/rhd_glx.c	1998/01/01 14:48:46	3.11
+++ ray/src/hd/rhd_glx.c	1998/01/04 08:32:00	3.13
@@ -278,6 +278,9 @@ double	rad;
 {
 	register int	ci, j;
 	double	apexh, basez;
+					/* is window mapped? */
+	if (!mapped)
+		return;
 					/* compute apex height (0. to 1.) */
 	if (ip[2] > 1e6)
 		apexh = 1. - 1./DEPTHFACT;
@@ -591,6 +594,7 @@ register XKeyPressedEvent  *ekey;
 		glFlush();
 		qtCompost(100);			/* get rid of old values */
 		inpresflags |= DFL(DC_REDRAW);	/* resend values from server */
+		rayqleft = 0;			/* hold off update */
 		return;
 	case 'K':			/* kill rtrace process(es) */
 		inpresflags |= DFL(DC_KILL);