--- ray/src/hd/rhdisp.c	1998/07/31 16:53:47	3.28
+++ ray/src/hd/rhdisp.c	1998/08/19 18:23:56	3.31
@@ -146,13 +146,18 @@ disp_wait()			/* wait for more input */
 	int	n;
 	register int	i;
 				/* see if we can avoid select call */
+	flgs = 0;		/* flag what's ready already */
 	if (imm_mode || stdin->_cnt > 0)
-		return(RDY_SRV);
+		flgs |= RDY_SRV;
 	if (sstdin != NULL && sstdin->_cnt > 0)
-		return(RDY_SIN);
-	if (dev_flush())
+		flgs |= RDY_SIN;
+	if (odev.inpready)
+		flgs |= RDY_DEV;
+	if (flgs)		/* got something? */
+		return(flgs);
+	if (dev_flush())	/* else flush output & check keyboard+mouse */
 		return(RDY_DEV);
-				/* make the call */
+				/* if nothing, we need to call select */
 	FD_ZERO(&readset); FD_ZERO(&errset);
 	FD_SET(0, &readset);
 	FD_SET(0, &errset);
@@ -171,7 +176,6 @@ disp_wait()			/* wait for more input */
 			return(0);
 		error(SYSTEM, "select call failure in disp_wait");
 	}
-	flgs = 0;		/* flag what's ready */
 	if (FD_ISSET(0, &readset) || FD_ISSET(0, &errset))
 		flgs |= RDY_SRV;
 	if (FD_ISSET(odev.ifd, &readset) || FD_ISSET(odev.ifd, &errset))
@@ -234,8 +238,11 @@ register PACKHEAD	*p;
 	for (i = p->nr; i--; ) {
 		hdray(ro, rd, hdlist[p->hd], gc, packra(p)[i].r);
 		d = hddepth(hdlist[p->hd], packra(p)[i].d);
-		VSUM(wp, ro, rd, d);		/* might be behind viewpoint */
-		dev_value(packra(p)[i].v, wp, rd);
+		if (d < .99*FHUGE) {
+			VSUM(wp, ro, rd, d);	/* might be behind viewpoint */
+			dev_value(packra(p)[i].v, rd, wp);
+		} else
+			dev_value(packra(p)[i].v, rd, NULL);
 	}
 #ifdef DEBUG
 	if (imm_mode) nimmrays += p->nr;
@@ -305,7 +312,7 @@ usr_input()			/* get user input and process it */
 		sstdin = NULL;
 		return(-1);
 	}
-	if (!*cmd)
+	if (*cmd == '\n')
 		return(DC_RESUME);
 	for (args = cmd; *args && !isspace(*args); args++)
 		;