final_images\onman\cut_pems.bmp

final_images\onman\cut_static.bmp

(a) ray-traced

(b) PEMs

(c) static EM

Note the missing reflections of the spout and lid knob when using a static environment map (EM).  Parameterized environment maps (PEMs) restore these self-reflections by fitting a per-view model and can be rendered in real time.