+/* values for special configurable properties (depending on level settings) */
+#define EP_EM_SLIPPERY_WALL 25
+
+/* values for pre-defined properties */
+#define EP_PLAYER 26
+#define EP_CAN_BE_CRUMBLED 27
+#define EP_CAN_MOVE 28
+#define EP_CAN_PASS_MAGIC_WALL 29
+#define EP_DONT_TOUCH 30
+#define EP_ENEMY 31
+#define EP_DONT_GO_TO 32
+#define EP_CAN_EXPLODE 33
+#define EP_BD_ELEMENT 34
+#define EP_SP_ELEMENT 35
+#define EP_SB_ELEMENT 36
+#define EP_GEM 37
+#define EP_FOOD_DARK_YAMYAM 38
+#define EP_FOOD_PENGUIN 39
+#define EP_FOOD_PIG 40
+#define EP_HISTORIC_WALL 41
+#define EP_HISTORIC_SOLID 42
+#define EP_BELT 43
+#define EP_BELT_ACTIVE 44
+#define EP_BELT_SWITCH 45
+#define EP_TUBE 46
+#define EP_KEYGATE 47
+#define EP_AMOEBOID 48
+#define EP_AMOEBALIVE 49
+#define EP_HAS_CONTENT 50
+#define EP_ACTIVE_BOMB 51
+#define EP_INACTIVE 52
+
+/* values for derived properties (determined from properties above) */
+#define EP_ACCESSIBLE_OVER 53
+#define EP_ACCESSIBLE_INSIDE 54
+#define EP_ACCESSIBLE_UNDER 55
+#define EP_WALKABLE 56
+#define EP_PASSABLE 57
+#define EP_ACCESSIBLE 58
+#define EP_WALL 59
+#define EP_SOLID_FOR_PUSHING 60
+#define EP_DRAGONFIRE_PROOF 61
+#define EP_EXPLOSION_PROOF 62
+
+#define NUM_ELEMENT_PROPERTIES 63