very small refactoring

circular.pov

@@ -21,7 +21,7 @@ object { Le_Decor }
 
 // =======================================================
 
-#declare R_circ = (SzSol * 1.40);
+#declare R_circ = R_circular + 2;
 #declare CK = NormClock * 2 * 3.141592654;
 
 #declare CamX = R_circ * cos(CK);