1-Which type of light would be
best to replicate a bare light bulb?
Point.
2- How do lights affect 2D and 3D
objects differently?
2D layers
ignore lights where 3D layers are affected by them.
3- What is Ambient Light?
Light that
does not have an identifiable source.
4- How is an Ambient Light
different from a Source Light?
Source light
has a clear and identifiable source and direction, which can be positioned
within the composition. Ambient light doesn’t consider a specific source and
illuminates compositions evenly.
5- What is a Parallel Light, and
why would one use it?
It is a
variation of point light that lacks a cone structure.
6- Describes what happens to the
illumination of an object as it moves away from a light.
The further
you move the object away from the light source; the illumination of the object
itself begins to decrease.
7- What happens to a layer as it
rotates away from the light source.
The
illumination of the object decreases.
8- Describe a light's Cone Angle?
We use the
cone angle for a light to control how spread out we want our light rays to be.
The wider the angle is, the more area is illuminated. The smaller it is, the
more focused on one area we become.
9- How do I move the light
without moving the POI?
You
manipulate the light’s actual position and location.
10- How do I move BOTH the light
AND POI at the same time?
By
manipulating the position of the light within the comp layer.
11- Which type of light is the
ultimate 'FILL' light?
Ambient
Light.
12- What does the term 'Diffuse'
mean?
It
is the scattering of light. It will generally soften an object, reducing
sharpness an reflection.
13- What does the term 'Specular'
mean?
The area of
reflection of light that is the strongest highlight on an object.
14- Can a precomp layer cast
shadows?
Yes
15- What are the 5 requirements
that must be met for shadows to work?
1) A
non-ambient light must be directed at both the layer you want to cast a shadow
and a layer to receive the shadow.
2) Cast
shadows option enabled.
3) The layer
casting a shadow must have cast shadows on.
4) The layer
receiving a shadow must have accepts shadows on.
5) There
must be space between both layers in z-axis.
16- As objects get closer to the layer
receiving it's shadow, does the shadow get sharper or more diffused?
The closer
an object is, the sharper it becomes.
17- If a layer's 'Light
Transmission' is set for 100%, how does that affect the layer?
It mixes
with the layer’s colors. The back of the layer are also illuminated and become
transparent.
18- A 'GOBO' is like a stencil
placed in front of a light. Does the layer have to have an alpha, or can the luminosity of the image work?
It must have
an alpha.
19- Adding lights really slows
down the render of a scene, what are 3 things that you can do to speed up
visual feedback?
1)
You can turn off lights that you don’t need as you work.
2)
Turn off realtime updating by pressing Option (alt) as you scrub.
3)
Enable Draft 3D.
20- Can I adjust the brightness
intensity of a light below the value of 0?
What happens if I do?
Yes,
it removes illumination.