9

988 Glossary
Ov ers hoot
Above: No overshoot
Below: Overshoot turned on
The Overshoot option causes a spotlight to
floodbeyonditsfalloffarea,andcastlightin
all directions. With Overshoot tur ned on, the
spotlightcastslightinalldirectionsbutcasts
shadows only within its falloff cone.
The Overshoot control effectively turns the
spotlightintoahybridbetweenanOmnilightand
a spotlight. With Overshoot set, the spotlight casts
light in all direc tions as an Om ni light does but st ill
casts shadows or projections as other spotlights
do. The shadows and projections are limited to
thefalloffregion:outsidetheconeofthespotlight,
Overshootcastslightbutdoesnotcastshadows
or projections.
Overshoot is useful when you want to light a large
area but need to cast shadows in only a smal l
part of that area. S et the falloff to include the
area where shadows must appear, and then turn
on Overshoot to light th e rest of the scene. This
techniquecanreducethesizeofshadowmapsand
thereby improve rendering speed.
PAL
PAL (Phase Alternate Line) is the video s tandard
used in most European countries. The frame rate
is 25 frames per second (fps) or 50 fields (page
3–938) per second, with each field accounting
for half the interleaved scan lines on a television
screen.
Pa r a met er Sp a ce
NURBSobjectshave,inadditiontotheirexistence
in 3D space, a parameter space that includes the
arr ay of knot values. NURBS curves have a single
U dimension in parameter space. NURBS surfaces
have two dimensions, U and V, in parameter space.
Parameters Panel
The parameters panel, found to the right of the
event display (page 3–936) in Particle View (page
2–125), displays the parameters of any action
whosenameyouclickinthedepot. Thepanel
uses the same format and editing methods as
the command panel in 3ds Max. Display of the
parameters panel can be toggled with the Particle
View menu command Display > Parameters.