very small refactoring

globals.inc

@@ -39,6 +39,8 @@ global_settings	{
 #declare H_QuadriLight = 34;
 #declare E_QuadriLight = SzSol * 1.35;
 
+#declare R_circular = (SzSol * 1.40);
+
 /* ------------------------------------------------------------ */
 /*
  *	Some textures...