Information About

Greeble




A greeble is a small piece of detailing added to break up the surface of an object to add visual interest to a surface or object, particularly in movie special effects. Greebles are closely related to '' Nurnies .''

The term also refers to a type of nonsense object used as stimuli in psychological studies of the Visual System .


GREEBLES IN MOVIES

The first recorded use of the term was by those working on the special effects for Star Wars - the group who would later become Industrial Light And Magic . They also described this design method as "guts on the outside".

In physical models, these ''greebles'' could be anything from parts of plastic cut to an interesting shape, or actual elements taken from shop bought model kits.

As would be expected, given these origins, greebling is most commonly associated with the particular kind of large city-like spaceships made popular in Star Wars , but has been generalized to refer to any dense covering by different (usually mechanical) components. Similarly, Borg Ships (and Drones ) in Star Trek appear heavily "greebled".

An anecdote from the creation of the first Star Wars movie involves the Tunisian customs enquiring what part of the costume of C-3PO - listed as "assorted greebles" was. Their response was allegedly "Something that looks cool but doesn't actually do anything."


In 3D Computer Graphics , greebles are often created automatically by specific Software , because generating greeble involves a lot of precise, tedious, and repetetive work, and many consider it a task best suited to Computers , particularly if a great degree of control is unnecessary or the greebles will not be particularly large on screen.

Most greeble generating software works by sub-dividing the surface to be ''greebled'' into smaller regions, adding some detail to each new surface, and then Recursively continuing this process on each new surface to some specified level of detail.


GREEBLES IN VISUAL PROCESSING AND FACE RECOGNITION

Examples of the second sense of greebles are Gauthier and Tarr 's 1997 and Gauthier et al.'s 1999 studies of how humans come to be experts at recognizing individual greebles. Such studies address the age-old nature/nurture debate surrounding the status of Face Recognition mechanisms. More specifically, although there have been some putative demonstrations of face "specialness" in Vision Processing , the same effects and patterns are obtained with greebles once observers have learned to recognize them at the expert level.

Among such greeble experts, for example, the same "configural" effects found for faces are found for greebles. Similarly, the pea-sized volume of the fusiform area in Visual Cortex which is more active for face processing as compared to object processing is also more active for greeble processing among greeble experts but not greeble novices.
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GREEBLES IN LEGO

Greebles are used by many people who build structures, especially spaceships, out of LEGO Bricks . These are similar to greebles used in movies such as Star Wars, except they are made only with LEGO. This presents a challenge, as it can be hard to create a "greebly" look with regulation bricks but the use of grilles, antennas, and clips help. LEGO bricks are also "naturally" greebled thanks to the interlocking studs, which can also help achieve a greebled look if used properly.


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REFERENCES

  • Gauthier, I., and Tarr, M. J. (1997). Becoming a "Greeble" expert: Exploring the face recognition mechanism. Vision Research, 37(12), 1673-1682.

  • Gauthier, I., Tarr, M. J., Anderson, A. W., Skudlarski, P., and Gore, J. C. (1999). Activation of the middle fusiform "face area" increases with expertise in recognizing novel objects. Nature Neuroscience, 2(6), 568-573.