Digital Imaging I Session 12

CGVC 120

Compositing Imagery

Compositing ImageryIdentifying properties of light

Identifying properties of shadow

Creating cast shadows

Adjusting light & shadow

Considering subjects when compositing

Creating reflections and refractions

Matching depth and perspective

Advanced compositing techniques

SubjectsHow are the objects / figures / environment related?

Opposites? Enemies? Friends?

Do they belong together?

Jake Garn Photography

SubjectsDoes the object interact with another object or the environment around?

Are objects intersecting?

Are objects overlapping? Is the scale relevant to real life? Is it surreal?

Light: Realism & MoodEverything we can visually discern is dependent on a light source What we perceive as “realistic” is based on our world’s lighting conditions Natural Light vs. Man Made Light Lighting affects color and value, and therefore greatly influences mood

MoodLighting can take the same image or subject and change its mood Soft - intimate, suspenseful

Colored - festive, upbeat

Harsh - dramatic, scary

Mood BoardsMood boards are a series of images, objects, and colors placed together to help convey a mood.

J Crew

De la Garza, Ivan

Simply Wed

Steven Arriagada and Jon Bling

Properties of LightHue – White light, yellow light, red light, etc.

Claudette Koller

Properties of LightIntensity

How bright?

Flickr: wendellmjr

Mason O’Mara

Properties of LightDirection

North, south, east, west?

To the right, left, front, or back?

Flickr: Sophie & Me

Properties of LightAngle

High or low in the sky?

Flickr: popscratch

Gazza or Garry

Light SourceIs there more than one light source?

How do they compare?

ShadowsShadows mimic all the properties of light

Shadows provide clues about light sources

Shadows ground objects

Shadows add realism

Types of ShadowsShadows mimic all the properties of light

Shadows provide clues about light sources

Shadows ground objects

Shadows add realism

Types of ShadowsLocal shadow Parts of an object not being hit by a light source

Cast Shadow Shadow thrown onto other objects from the casting object that is blocking the light

Drop shadow A simple offset shadow, maintaining the basic shape of the object

Shadow PropertiesDirection Away from the light source

Intensity (value) How dark?

Hue Complementary color in cast shadows

Rieke Photography

Shadow PropertiesOpacity How much local color is showing through?

Decay How fast does it loses its intensity Length (cast shadows only)

Steffan Hall

Flickr : claude05

rick montalbano

Flickr : teddymb

Vilhjálmur Ingi Vilhjálmsson

Michael Marsh

Flickr: Bellarus6666

Reflections & RefractionsReflection is when light bounces off a surface. It does not shine through the surface. Refraction is when light is bent and absorbed by a medium. Light passes through a material. A prism refracts light.

Reflections & RefractionsHow much light is reflected?

Are there any reflective surfaces in the image?

Is the surface metallic, opaque?

What is within view that may be affected by light?

RonAlmog

Flickr: bcanepa_photos

Sergio Figliolia

Reflections & RefractionsAre there any transparent surfaces in the image?

How transparent is the surface?

How much distortion does it create?

Flickr: pauly...

jackmalvern

Wikipedia

Spatial IndicatorsHow much space/depth is shown? Shallow or deep Do any objects overlap?

Spatial IndicatorsDo objects in the foreground and distance follow the rules of perspective?

Atmospheric perspective

Size & proportion

Horizon line & vanishing point

David Humpohl

Gaëtan Bourque

Salvador Dali

Salvador Dali

ToolsDodge / burn

Gradient overlays

Opacity & Blending Modes

Shape/Layer transformation

Filters

Scaling

Perspective transform

Blurring & Sharpening

Layer masks

Rene Margritte

Austin Hamby