Tuesday, March 14, 2017

* DC1 2017 SPRING Week 1: Notes, Articles, and Video Links...


- Overview: Value range 0-100% (or 1-10), local value, halfway to black, AO, form shadow, core shadow, cast shadow, bounce light, highlight, specular highlight

- James Gurney Color and Light, page 46 demo
- Mo Kim Demo PSD  (Rt Click, Save As)
- Nametag PSD (Rt Click, Save As)

- Form and Light Study:
  • 1 primitive block setup (3 overlapping blocks), 3 different lights setups (i.e. 3 qtr, top, side, backlight)
  • Overlap primitives, have some cast shadows falling onto each other
  • Label the types of light and shadows with value numbers for each NEATLY (use the Line Tool, Type Tool, Group layers, etc)
  • Inset a basic overhead map of the objects and the light

- For Printing:
  • 1 clean, 1 labeled (6 total)
  • Tip: At the very top layer, add an Adjustment Layer for Levels, and boost the shadows and midtones to get a 'better' print. Do a few small test prints if you can.
  • Also have your name tags ready 


Types of Shadows:

  • Where light meets shadow
  • Light rays are tangent to the edge of the form
  • Softness/hardness determined by the form

  • Shadow part that starts after terminator
  • Only visible if secondary light (reflect, bounce, fill, edge/rim) is weaker than the main light

  • Areas where shadow is the darkest, light doesnt get in
  • Happens where two forms meet (folds, corners, vertical plane meets horizontal plane)

  • When light hits an object, a cast shadow is projected (ray trace)
  • Cast shadow can be used as a design element 
  • Color and value is dependent on atmosphere, color of the sky (since it is a plane that faces upward) - it is NOT black.

  • Soft light casts a shadow with a soft and blurry edge
  • Hard light casts a shadow with a sharper edge
  • Edges of shadows get blurrier as the distance increases from the object that casts the shadow

Types of Light:

  • Shows most form, little shadow on the opposite side of the Broad light
  • Rembrandt Light - when nose shadow merges with the shadow side of the face, also leaves triangle on the cheek closest to the viewer
  • Contrast depends on the type of light

  • Hard or diffuse, shows more 2d form/design
  • aka Frontal Light, good for characters
  • Contrast varies depending on the light

  • aka edge light, kicker is a strong light from behind the subject to separate subject from the background, used extensively in photography and film
  • Width of the rim light varies depending on the form - NOT just a white outline of the form
  • Lots of contrast

  • aka Contre Jour shows off silhouette
  • Edges soften and harden in different areas depending on the form
  • Less contrast, tight value organization 

  • Dramatic, unusual light because in nature there’s not much bottom light

  • Any object receiving direct light will reflect color/light onto other forms around it
  • Sky color reflects onto upward facing planes, downward facing planes warmer
  • Vertical planes receive a combination of warm and cool bounce light
  • Falloff is quicker as you get away from the source of the reflected object

* Scott Robertson: Halfway to Black
  • Form shadow value typically are halfway to black in value (1-10)
  • If primitive is a 6 local value, shadow color is around 3
  • If table is a local value 3, then the cast shadow color is 1.5

Value Grouping:
  • Break each of the 4 planes down into their own values:
  • Top plane
  • Side plane in lighter halftone
  • Front planes in darker halftone
  • Side planes in shadow
  • Squinting, using filters in Pshop help group values to break down light and shadow forms

PS Tips:

  • Setting up and Saving a Workspace
  • Keyboard shortcuts:
    • Brush size mapped to Radial
    • Blend Modes mapped to Radial
    • Using Command/Option + Transform
    • Masking, Clip Masking mapped to button (Alt+G)
    • Locking layers ( / )
    • Flipping, Canvas Flipping ( CMD F, CMD Shift F)
    • Copying everyone got 1 layer (CMD+Opt+Shift+E)
    • Opt on the Pen Button for color picking
    • Step Backward/Forward on tablet button
  • Shortcuts for all Tools
  • Line Tools, Shape Tools
  • Tool Preferences (Brush, Line, Custom Shape, Exposure)

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