Warp is created similar as fog, haze and gravity. Entity that contains polygons with warp must point to mirror source entity. Mirror source entity must point to mirror target entity. Mirror target entity is used as camera origin for warp rendering. To create warp: select world base, select mirror 1 target property. Change value of property to point to mirror source entity (in target combo box select mirror target or Ctrl+Alt+click it from world). Select mirror source entity. Its target set to be mirror target. Select polygons to render warp. In polygon page of info window select mirror 1. Alter transparency of polygon's texture: change value of color 's alpha channel (see how to edit colors).