--- ray/doc/materials.1	2004/09/20 17:32:04	1.2
+++ ray/doc/materials.1	2004/09/21 18:44:09	1.3
@@ -1,4 +1,4 @@
-.\" RCSid "$Id"
+.\" RCSid "$Id: materials.1,v 1.3 2004/09/21 18:44:09 greg Exp $"
 .\"Print with tbl and eqn or neqn with -ms macro package
 .vs 12
 .nr VS 12
@@ -318,7 +318,7 @@ bold rho sub d ~=~ bold p^bold C (1 ~-~ a sub 4 )
 .EQ I
 bold rho sub si ~=~ left {~ lpile {{bold r sub s
   {f sub s ( q hat sub i )} over
-  ( q hat sub i cdot n hat sub p ) cos sub 1} above
+  {( q hat sub i cdot n hat sub p ) cos sub 1}} above
   0 } ~~~ lpile { {if~a sub 5 >0} above otherwise }
 .EN
 .EQ I
@@ -376,7 +376,7 @@ bold rho sub d ~=~ bold p^bold C^(1 ~-~ a sub 4 ) ( 1 
 .EQ I
 bold rho sub si ~=~ left {~ lpile {{bold r sub s
   {f sub s ( q hat sub i )} over
-  ( q hat sub i cdot n hat sub p ) cos sub 1} above
+  {( q hat sub i cdot n hat sub p ) cos sub 1}} above
   0 } ~~~ lpile { {if~a sub 5 >0} above otherwise }
 .EN
 .EQ I
@@ -395,7 +395,7 @@ bold tau sub d ~=~ a sub 6 (1~-~bold r sub s ) (1~-~a 
 .EQ I
 bold tau sub si ~=~ left {~ lpile {{a sub 6 a sub 7 (1~-~bold r sub s )^
   bold p^bold C {g sub s ( q hat sub i )} over
-  (- q hat sub i cdot n hat sub p ) cos sub 1} above
+  {(- q hat sub i cdot n hat sub p ) cos sub 1}} above
   0 } ~~~ lpile { {if~a sub 5^>^0} above otherwise }
 .EN
 .EQ I