barnMode: barnMode: In 'physical' mode the barn behaves like an open window through which light falls. The falloff and blur are determined by the size of the light, the distance to the light and distance from the barn. In 'analytic' mode, the barn has a fixed projection and manual falloff controls.
directional: directional: Whether or not the light projects along a direction or out from a point.
shearX: shearX: Shear the projection along the x-axis.
shearY: shearY: Shear the projection along the y-axis.
apex: apex: Distance between center of barn and center of projection.
useLightDirection: useLightDirection: If checked the projection direction is determined by the position of the center of the light source. Otherwise it only follows the orientation of the cookie. WARNING: this does not work with dome and geometric area lights.
width: width: Width of the inner region of the barn (x axis).
height: height: Height of the inner region of the barn (y axis).
radius: radius: Radius of the corners of the inner barn square.
edge: edge: Thickness of the edge region. Greater value will add more softness to the edges of the barn shape.
preBarn: preBarn: The effect on the light before it reaches the barn.
scaleWidth: scaleWidth: Scale the width of the inner barn shape (x axis). This includes scaling the radius.
scaleHeight: scaleHeight: Scale the height of the inner barn shape (y axis). This includes scaling the radius.
left: left: Additional offset of the left region (-x axis).
right: right: Additional offset of the right region (+x axis).
bottom: bottom: Additional offset of the bottom region (-y axis).
top: top: Additional offset of the top region (+y axis).
leftEdge: leftEdge: When edge is > 0, this scales the edge of the left region (-x axis).
rightEdge: rightEdge: When edge is > 0, this scales the edge of the right region (+x axis).
bottomEdge: bottomEdge: When edge is > 0, this scales the edge of the bottom region (-y axis).
topEdge: topEdge: When edge is > 0, this scales the edge of the top region (+y axis).
density: density: How much effect the component has (0-1).
invert: invert: When this is on, invert the entire effect of the light filter.
intensity: intensity: Multiplier for both the diffuse and specular result.
diffuse: diffuse: How much this light filter affects diffuse lighting.
specular: specular: How much this light filter affects specular lighting.
densityNear: densityNear: Distance from the barn where the density interpolation starts.
densityFar: densityFar: Distance from the barn where the density interpolation ends.
densityNearVal: densityNearVal: Density multiplier where the blur interpolation starts.
densityFarVal: densityFarVal: Density multiplier where the blur interpolation ends.
densityPow: densityPow: Exponent of the density interpolation.