--- ray/src/rt/glass.c	1990/05/30 19:57:01	1.4
+++ ray/src/rt/glass.c	1990/10/15 20:39:32	1.5
@@ -49,7 +49,6 @@ register RAY  *r;
 	FVECT  pnorm;
 	double  cos2;
 	COLOR  trans, refl;
-	double  transbright;
 	double  d, r1;
 	RAY  p;
 	register int  i;
@@ -61,6 +60,7 @@ register RAY  *r;
 
 	if (r->rod < 0.0)			/* reorient if necessary */
 		flipsurface(r);
+	r->rt = r->rot;				/* default ray length */
 						/* get modifiers */
 	raytexture(r, m->omod);
 	pdot = raynormal(pnorm, r);
@@ -80,7 +80,6 @@ register RAY  *r;
 		d = colval(mcolor, i);
 		colval(trans,i) = (1.0-r1)*(1.0-r1)*d / (1.0 - r1*r1*d*d);
 	}
-	transbright = -FTINY;
 						/* transmitted ray */
 	if (rayorigin(&p, r, TRANS, bright(trans)) == 0) {
 		VCOPY(p.rdir, r->rdir);
@@ -88,8 +87,8 @@ register RAY  *r;
 		multcolor(p.rcol, r->pcol);	/* modify */
 		multcolor(p.rcol, trans);
 		addcolor(r->rcol, p.rcol);
-		transbright = bright(p.rcol);
-		r->rt = r->rot + p.rt;
+		if (bright(p.rcol) > .5)
+			r->rt = r->rot + p.rt;
 	}
 
 	if (r->crtype & SHADOW)			/* skip reflected ray */
@@ -107,7 +106,5 @@ register RAY  *r;
 		rayvalue(&p);
 		multcolor(p.rcol, refl);
 		addcolor(r->rcol, p.rcol);
-		if (bright(p.rcol) > transbright)
-			r->rt = r->rot + p.rt;
 	}
 }