Top SFX shots No.40: Star Trek: The Motion Picture

The entrance to the inner heart of TMP's monstrous space-urchin follows the organic motif established so impressively in Douglas Trumbull's (perhaps excessively-used) footage of V'Ger. The thing is, it's very hard to tell how that organic aperture is actually working. Is it an iris of some kind or are the 'petals' actually changing shape? Truth is that the gate segments are actually cones spinning in unison. Since the camera remains perpendicular to the circular bases of the cones, the secret is hard to guess.

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