--- deliantra/server/server/spell_attack.C	2008/12/22 21:51:11	1.71
+++ deliantra/server/server/spell_attack.C	2008/12/27 08:01:07	1.72
@@ -1500,7 +1500,7 @@
 
         // players can only affect spaces that they can actually see
         if (caster && caster->contr
-            && caster->contr->visibility_at (m, nx, ny) < 70)
+            && caster->contr->darkness_at (m, nx, ny) == LOS_BLOCKED)
           continue;
 
         for (tmp = GET_MAP_TOP (m, nx, ny); tmp; tmp = tmp->below)