ThingCategoryItem = 0
ThingCategoryCreature = 1
ThingCategoryEffect = 2
ThingCategoryMissile = 3
ThingInvalidCategory = 4
ThingLastCategory = ThingInvalidCategory

ThingAttrGround           = 0
ThingAttrGroundBorder     = 1
ThingAttrOnBottom         = 2
ThingAttrOnTop            = 3
ThingAttrContainer        = 4
ThingAttrStackable        = 5
ThingAttrForceUse         = 6
ThingAttrMultiUse         = 7
ThingAttrWritable         = 8
ThingAttrWritableOnce     = 9
ThingAttrFluidContainer   = 10
ThingAttrSplash           = 11
ThingAttrNotWalkable      = 12
ThingAttrNotMoveable      = 13
ThingAttrBlockProjectile  = 14
ThingAttrNotPathable      = 15
ThingAttrPickupable       = 16
ThingAttrHangable         = 17
ThingAttrHookSouth        = 18
ThingAttrHookEast         = 19
ThingAttrRotateable       = 20
ThingAttrLight            = 21
ThingAttrDontHide         = 22
ThingAttrTranslucent      = 23
ThingAttrDisplacement     = 24
ThingAttrElevation        = 25
ThingAttrLyingCorpse      = 26
ThingAttrAnimateAlways    = 27
ThingAttrMinimapColor     = 28
ThingAttrLensHelp         = 29
ThingAttrFullGround       = 30
ThingAttrLook             = 31
ThingAttrCloth            = 32
ThingAttrMarket           = 33
ThingAttrChargeable       = 254 -- deprecated
ThingLastAttr             = 255

SpriteMaskRed = 1
SpriteMaskGreen = 2
SpriteMaskBlue = 3
SpriteMaskYellow = 4