An attacker can mimic the background's optic flow by choosing its flight path so as to remain on the line between the target and either some real landmark point, or a point at infinite distance (giving different pursuit algorithms). It therefore does not move from the landmark point as seen by the target, though it inevitably looms larger as it approaches. This is not the same as moving straight towards the target (classical pursuit): that results in visible sideways motion with a readily detectable difference in optic flow from the background. The strategy works whether the background is plain or textured.