8

Object Properties Dialog (Cloth) 585
now defined on a seam-by-seam basis at the S eams
sub-object level.total shear value is not exceeded.
Density — The weight of the cloth per unit area (in
gm/cm2). Higher values mean heavier cloth like
denim. Use sma ller values for lig hter cloth like silk.
Dampi ng— The larger this value, is the more
sluggishlythefabricwillreact.Withalowervalue,
thefabricwillbehavewithmorespring. Cloth
with more damping will come to rest sooner then
clothwithlessdamping.Highdampingresultsin
cloth that behaves as though it is moving through
oil. Excessive damping may also cause simulation
instabilities. A good value is 0.01 (note: the default
is 0.1, but in practice, it seems that this value is
too high).
UScale—Controls how much to shr ink or expand
the cloth along the U direction (as defined by
Garment Maker). For non-Garment Maker
meshes, this applies a uniform scaling to the cloth
along both axes, and the V Scale parameter is
ignored). A value of less than 1 w i l l shrink the
fabric at simulation time, while a value of more
than 1 will stretch it.
VScale—Controls how much to shrink or exp and
the cloth along the V direction (as defined by
Garment Maker). A value of less than 1.0 will
shrink the fabric at simulation time, while a value
of more than 1.0 will stretch it.
Plasticity—The tendency of the cloth to keep its
current deformation (that is, the bend angles).
This is different from
Keep Shape ,which
determinestheextenttowhichtheclothtendsto
keep its original deform at ion (or the one defined
by the Target State). If you set Plasticity to 100.0,
the cloth wi ll not attempt to change the angles
between tr iangles. If you want stiffer cloth, but you
don’twanttheclothto"balloon"up,increasethe
Plasticity value.
Depth—Collision depth for the cloth object. If
a portion of cloth reaches this depth inside a
collision object, then the simulation will no longer
trytopushtheclothoutofthemesh.Thisvalueis
measured in 3ds Max units.
To specify a Depth value specific to the cloth
object, use this sett ing and be sure to turn on
Use
Cloth Depth/Offset
.
Offset—The distance maintained between the
cloth object and the collision object. A very low
value can cause the collision mesh to protr ude
from under the cloth. A very high value c auses t he
fabric to appear to be floating above the collision
object. This value is measured in 3ds Max units.
To sp ecify an Offset value spe cific to the cloth
object, use this sett ing and be sure to turn on
Use
Cloth Depth/Offset
.
Based on—Lists the preset that the C loth Properties
are based on. When you mo dify some parameters
and save a preset, it will use the name of the last
preset you loaded as the Based on name.
Anisotropic—When on, you can set different U
andVvaluesfortheBend,B-Curve,andStretch
parameters. T he U and V directions are defined
by
Garment Maker (page 1–587) and do not apply
to non-Garment Maker meshes, for which setting
different U/V va lues might result in unexpected
behav ior.
Use Cloth Dep th/Offs et—Uses the Depth and Offset
values set in Cloth Proper ties. When on, the cloth
object ignores the collision object Depth and
Offset values.
UseEdgeSprings—Enables an alternative method
for c alculating stretch. When on, stretch force
is based on springs along triangle edges. When
off, the stretch and shear forces are calculated in
a more sophisticated manner to more accurately
reflect the underlying physics.
Use S olid Friction—Uses the friction of the collision
object to determine friction. Values for collision
can be assigned either to the cloth or the collision