--- ray/src/hd/rhdriver.h	1997/12/31 09:06:54	3.11
+++ ray/src/hd/rhdriver.h	1998/01/06 05:26:20	3.12
@@ -68,6 +68,13 @@ error(COMMAND, "appropriate user warning").
 
 
 void
+dev_clear()		: clear device memory
+
+Clear the device memory in preparation for fresh data.  Clearing
+the screen is optional.
+
+
+void
 dev_value(c, p, v)	: register new point of light
 COLR	c;		: pixel color (RGBE)
 FVECT	p;		: world intersection point