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					Basic Lighting

  Intro to Maya
            Types of Lights
•   Ambient Light
•   Direction Lights
•   Spot Lights
•   Point Lights
•   Advanced: Area Light
•   Advanced: Volume Lights
                Ambient Light
•   An ever present light
•   `Floods’ the scene
•   No highlights
•   No Shadows
•   Good for Base
    Lighting
              Direction Light
• Light from a single
  direction.
• Like sun-light.
• Has shadows
• Has highlights.
• A good basic light.
                    Spot Light
•   A theatrical spot-light.
•   Has shadows
•   Radiates out in a cone
•   Has fall-off
•   Has penumbra
•   Very powerful.
                Point Light
• A local light
• Radiates in all
  directions
• Great `filler’ light
• Has shadows
• Can really punch up a
  scene.
• Very dramatic
    Components of Light and Shadow
•   Light source.
•   Fall-off/decay
•   Shadow
•   Umbra
•   Penumbra
             Light Controls
•   Aim From/Aim At
•   Fall-off Rate
•   Cone Radius
•   Penumbra/Umbra control
•   Non-linear fall-off
•   All In One Control
Aim From/Aim At
Fall-off Rate
Cone Radius
Penumbra/Umbra Control
Non-linear fall-off
All In One Control
        Good ways to use lights
•   Look to photographers for good techniques
•   Think in terms of balance.
•   Avoid the overly dramatic.
•   Look at natural lighting.
•   Avoid saturated lights and hues
•   Normally only need a few lights.
•   Avoid disco colors and effects 
Light Intensity from too
Dark to too bright.
                Direction




Lit from Left         Lit from behind camera
                    Mood




Menacing/Dramatic          Subtler Mood
                    Localized Light




Light a person from above
The head for more `spiritual’
Effects.                        But you need to be careful
      Seasons and Time of Day




Early-Morning   Mid-Day/Winter   Evening/Dusk
Blue Tint       Less blue tint   Summer
                Even colors      Orange Hues
              The Ray of Hope




By placing a subtle localized light source near the left
eye the image takes on a more hopeful appearance.
This has to do with the local shadows fall on the face.
          3 Point Lighting
• Most Common lighting scheme
• Three lights:
  Key Light, Fill Light, and Back
               3 Point Lighting
Key light
The Key light establishes the dimension, form and
   surface detail of subject matter.
Fill light
The Fill light fills in the shadows created by the
   horizontal and vertical angles of the key light. The fill
   light should be placed about 90-degrees away from
   the key light.
Back light
The function of the Back light is to separate the subject
   from the background by creating a subtle rim of light
   around the subject.
    3 Point Lighting - Tutorial
• http://www.3drender.com/light/3point.html

				
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posted:8/20/2012
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