--- ray/src/rt/virtuals.c	1991/08/13 12:16:43	1.23
+++ ray/src/rt/virtuals.c	1991/08/26 10:10:43	1.26
@@ -287,7 +287,8 @@ register int  sn;	/* target source number */
 	getplaneq(onorm, o);
 				/* set number of rays to sample */
 	if (source[sn].sflags & SDISTANT) {
-		n = 4.*or2/(thescene.cusize*thescene.cusize)*vspretest + .5;
+					/* 32. == heuristic constant */
+		n = 32.*or2/(thescene.cusize*thescene.cusize)*vspretest + .5;
 		infront = DOT(onorm, source[sn].sloc) > 0.;
 	} else {
 		for (i = 0; i < 3; i++)
@@ -318,7 +319,7 @@ register int  sn;	/* target source number */
 #endif
 				return(f);	/* too small a target! */
 			}
-			peano(offsdir, 3, urand(931*i+5827+ssn), .005);
+			multisamp(offsdir, 3, urand(sn*931+5827+ssn));
 			for (i = 0; i < 3; i++)
 				offsdir[i] = or*(1. - 2.*offsdir[i]);
 			ssn++;
@@ -348,9 +349,7 @@ register int  sn;	/* target source number */
 		nok++;
 					/* check against obstructions */
 		rayclear(&sr);
-		sr.revf = raytrace;
-		rayvalue(&sr);
-		if (bright(sr.rcol) > FTINY)
+		if (!localhit(&sr, &thescene) || sr.ro == source[sn].so)
 			nhit++;
 		if (nhit > 0 && nhit < nok) {
 #ifdef DEBUG