RichMurphy
Supporting Actor
By me."Admittedly bad"? Admitted by whom? Perhaps if judging by today's standards one could consider them poor, but the optical effects in The Birds were state of the art in 1963. The sodium vapor ("yellow screen") process was used for some effects shots because it minimized or eliminated the fringing that often occurred in the blue screen process.
I don't know if this was caused by the yellow screen system or not, but such effects always seem to have the composited images mismatched when it came to contrast and/or color density.], more so than the usual blue screen effects. As a result, any illusion of depth or of the two images supposedly being in the same place was lost on me.
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