Projection (For Analytic Barn Only)

Directional

When this is on, the texture projects along a direction using the orthographic projection. When it is off, the texture projects using a focal point specified by the Apex.directional = off, on

Shear X

Shear the projection along the X-axis.

shearX = 0, 1, 2

Shear Y

Shear the projection along the Y-axis.shearY = 0.0, 0.1, 0.2

Apex

Distance between the center of the barn and the center of projection. This is only applicable when Directional is off.

apex = 0.1, 1.0, 10

Use Light Direction

Barn Shape

Width

Width of the inner region of the barn (X-axis).

width = 0.0, 0.2, 0.8

Height

Height of the inner region of the barn (y-axis).

height = 0.0, 0.4, 0.8

Radius

The radius of the corners of the inner barn square.radius = 0.1, 0.3, 1.0

Edge

The thickness of the edge region.

edge = 0.0, 0.1, 0.3

Pre Barn

• no effect (0)
• cone (1)
• no light (2)

Scale

Scale Width

Scale the width of the inner barn shape (X axis).

scale width = 0.1, 1.0, 10

Scale Height

Scale the height of the inner barn shape (Y axis).

scale height = 0.1, 1.0, 10

Refine Edges

Left

The additional size of the left region (-X axis)

refine edge left = 0.0, 0.25, 0.5

Right

The additional size of the right region (+X axis)refine edge right = 0.0, 0.25, 0.5

Bottom

The additional size of the bottom region (-Y axis)

refine edge bottom = 0.0, 0.25, 0.5

Top

The additional size of the top region (+Y axis)refine edge top = 0.0, 0.25, 0.5

Scale Edges

Left Edge

Additional soft size of the left region (-X axis).

scale edge left = 1, 2, 5

Right Edge

Additional soft size of the right region (+X axis).scale edge right = 1, 2, 5

Bottom Edge

Additional soft size of the bottom region (-Y axis).scale edge bottom = 1, 2, 5Y axis).

Top Edge

Additional soft size of the top region (+Y axis).

scale edge top = 1, 2, 5

Multiplier

Density

Controls the strength of this light filter.density = 0.45, 0.7, 1.0

Invert

Specify whether to invert the result of this light filter before it is applied.invert = off, on

Intensity

Global Multiplier for both the diffuse and specular contribution below.intensity = 0, 1, 4

Diffuse

Multiplier of this light filter result for the diffuse contribution.

diffuse = 0, 1, 5

Specular

Multiplier of this light filter result for the specular contribution.specular = 0, 1, 5

Density Falloff (For Analytic Barn Only)

Density Near

Distance from the barn where the density interpolation starts.density near = 0.0, 0.5, 1.0

Density Far

Distance from the barn where the density interpolation ends.

density far = 0.0, 0.5, 1.0

Density Near Val

Density multiplier where the blur interpolation starts.near value = 4, 6, 10

Density Far Val

Density multiplier where the blur interpolation ends.

far value = 6, 9, 12

Density Exponent

The exponent of the density interpolation.exponent = 0.1, 0.5, 1.0

Combine Mode

Combine Mode

mult: The results of all the filters are multiplied together

max: The maximum result from all filters is used. This works best for grey-scale light filters.

min: The minimum result from all filters is used. This works best for grey-scale light filters.

screen: Similar to the max operation, but it combines gradients in a smoother way. This works best for grey-scale light.

Light filters on a light that are grouped by their combined mode. Light filters in the same group are executed together and combined by the combined mode. The groups are executed in this order (max, min, screen, and then mult) and are multiplied together, which means a filter that turns things black in the mult group will zero out all other filters.