gobo

Class

Shader

Output

null

Synopsis

Gobo filter connected to a spot light. Logo texture is connected to 'slide map'.


The gobo filter can only be used with spot lights. In theatrical stage lighting, a gobo (or "cookie", slang for Cucoloris) is a thin sheet of metal with holes used to break up the light beam into an irregular, more natural pattern such as tree leaves etc. In the computer graphics world, gobos are sometimes referred to as "slide projectors" (or sometimes "projector lights", but note that in Arnold the gobo is not light source itself, but a filter applied to a spot light source). Any texture map or procedural shader can be projected through the light.


 


 

filter_mode  
The blending equation by which the gobo's slide map is combined with the lights output. 'Blend' creates a default gobo effect. 'Replace' multiplies the slide map over the spot light. 'Add' multiplies the spot light over the gobo. 'Sub' inverts the RGB values of the slide map. 'Mix' averages the results equally between the spotlight and the slide map.

 

 

slidemap

Texture map used to create the gobo effect.

rotate
Rotate the texture image.
offset
UV coordinate values used to offset the direction of the slide map.
density
Controls the density of the gobo. Higher values will make the gobo more opaque, thereby letting less light through.
scale_s
Scales the texture used for the slide map in the S direction.
scale_t
Scales the texture used for the slide map in the T direction.
scale_st_images
wrap_s
Controls how the 2d texture map is repeated on a surface in the S direction.
wrap_t
Controls how the 2d texture map is repeated on a surface in the T direction.
periodic

The texture repeats itself outside the [0,1] range in (S,T) space.

mirror

Mirror's the image across the boundaries.

file

Use's the wrap mode found in the file.

clamp

Clamp's the image to the closest texture edge.

black

Return's black outside the [0,1] range.

 

name

---

 

Example Renders

Further examples

 

 


  • No labels