--- ray/src/rt/rtrace.c	1991/05/21 17:41:23	1.14
+++ ray/src/rt/rtrace.c	1991/07/18 14:43:03	1.18
@@ -46,6 +46,9 @@ int  vresolu = 0;			/* vertical resolution */
 double  dstrsrc = 0.0;			/* square source distribution */
 double  shadthresh = .05;		/* shadow threshold */
 double  shadcert = .5;			/* shadow certainty */
+int  directrelay = 0;			/* number of source relays */
+int  vspretest = 512;			/* virtual source pretest density */
+int  directinvis = 0;			/* sources invisible? */
 
 int  maxdepth = 6;			/* maximum recursion depth */
 double  minweight = 4e-3;		/* minimum ray weight */