#declare HoverCraftSize = max_extent( HoverCraftObject ) - min_extent( HoverCraftObject );
#declare HoverCraftCenter = ( max_extent( HoverCraftObject ) + min_extent( HoverCraftObject ) ) / 2;

#declare FinalHoverCraft = object{ HoverCraftObject translate -HoverCraftCenter translate HoverCraftSize.y / 2 * y }

#declare ViewSize = HoverCraftSize.z * 2 * 1.1;