6 Gobos

Any thin metal and glass items than can be placed in a light beam to create a pattern, offset or multiplication is classified as a gobo.

<Gobo Identifier="9abef057-f594-48c1-b58f-7cefefbb1776" Version="8" VersionDate="2020-08-05" Brand="Robe" Code="15020248" Name="Organic">
    <ReplacementGobo Identifier="5f2ff1d2-1f34-4db7-a807-102676050cef" Version="3" />
    <!-- (cut) -->

Above: The Robe Organic gobo.

Each gobo CEF file comes with a PNG file with the same name. For prisms this image only serves as an illustration.

Robe 15020248 Organic

Above: The PNG file of the “Robe 15020248 Organic” gobo

Gobo Attribute Description
Type The type of the gobo, see below.
AnimationDiscRatio The amount of pattern of the animation disc visible at any time in the beam, expressed as a ratio of half of the image.
Brand The name of the manufacturer.
Code An optional part code.
Name An optional descriptive name.
Origin An optional designation in the absence of a part code or descriptive name. This is normally a combination of the fixture, wheel and slot position it can be found in.

Gobos have been broken down into three types:

  • Pattern - the standard gobo that only obscures and/or colours parts of a light beam.
  • Animation Disc - oversize round discs that are rotated in front of the light beam to create the effect of animation.
  • Prisms - glass inserts that can offset and multiply a beam.

6.1 Tags

All gobos are tagged using a system that makes it possible to identify similar gobos.

The Tags element contains a string which is a list of comma separated tags. Each tag is a name and an optional cardinality following a slash.

The example given above can be decoded as follows:

  • Dot/* - a large number of dots.
  • Radial/7 - 7 radial elements.
  • Swirl - a generally swirl-like appearance.

The tagging system is used to generate a list of suitable replacement gobos for a gobo. These appear as ReplacementGobo elements in a gobo in order of suitability.