Apply barn doors when you want to create the effect of light pouring out of a half-opened door. are shutters applied to a spot light’s beam. are off by default; you must turn them on, then adjust them to get the desired light spill.
- Select a Spot Light whose manipulators are displayed, then turn on in the .
- In the section of the spot light’s , turn on .
- Select from the view’s menu to look through the selected light. (The manipulators are only visible in the light’s view.)
Four blue lines appear. These lines represent a rectangular boundary for the spot light. No light reaches the regions outside
the blue line-boundaries.
- You can directly manipulate each of the four lines with the to shift the boundaries. (Alternatively, you can enter precise numerical values in the .)
Attributes are in degrees measured from the spot light to the blue line-boundary. For instance, for an 80 degree spot light,
the four blue line-boundaries are 40 if the boundaries lie exactly at the spot light border.
When you use the settings, the Light Shape sample changes at the top of the .
- Tweaking the penumbra value displays a second circle. Change the value in the or click theicon to display and use the manipulator, then select to see the circle.
The region between the two circles results in a softer illumination.
- If the penumbra value is set to 0 (the default) and is on, this results in a very hard-edged look to the lighting. With a non-zero penumbra value, the barn door effect is a
smooth illumination of the scene.
You can also verify the illumination by looking at the and at the top of a spot light’s . These change as you change the values for the spot light.
- To return to the current view, select the view from the menu.
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