--- ray/src/rt/source.c	1989/09/29 10:04:01	1.17
+++ ray/src/rt/source.c	1989/11/29 14:35:27	1.18
@@ -379,7 +379,10 @@ char  *p;			/* data for f */
 		if (localhit(&sr, &thescene) &&
 				sr.ro != source[cntord[sn].sno].so) {
 						/* check for transmission */
-			rayshade(&sr, sr.ro->omod);
+			if (sr.clipset != NULL && inset(sr.clipset, sr.ro->omod))
+				raytrans(&sr);
+			else
+				rayshade(&sr, sr.ro->omod);
 			if (bright(sr.rcol) <= FTINY)
 				continue;	/* missed! */
 			(*f)(srccnt[cntord[sn].sno].val, p,