8

Assign Ver tex Colors Utility 1547
Channel group
Here you’ll find tools to choose which channel
type the vertex color utility will assign. If y ou
choose map channel, you can also specify the map
channel ID number.
• Vertex Color—Choose this to assign a v ertex
color la yer.
•
Vertex Illum—Cho ose this to assign a vertex
lighting layer.
•
Vertex Alpha—Choose this to assign a vertex
transparency layer.
•
Ma p Channel—Choose this to assign a
specifically numbered map channel.
Ma p channel spinner—Usethistodefinethe
channel number. Avai lable only when Map
Channel is chosen.
Name—If a channel has a name defined, it will
appear here. Channels can be named using the
Channel Info Ut i lity (page 2–1549) .
Note: Although the Color, Illum, and Alpha
channels have specific names, in fact 3ds Max doe s
not enforce what kind of data is saved in them, and
any of the three channels can contain four-channel
(RGBA) vertex color data.
Light Model group
Provides options that let you spe cify how the
surface of the objec t appears to be illuminated.
• Lighting + Diffuse—Uses the current scene
lighting and materials to affect the vertex colors.
•
Lighting Only—Uses only lighting to assign
vertex colors, ignoring material properties.
When this option is chosen, Shadows and
Mapping are disabled in the Rendering Options
rollout.
•
Diffuse—Uses the material’s diffuse color,
ignoring the lighting.
Color Assignment group
Lets you specify how colors are interpolated across
surfaces.
• Color by Face—(The default.) Colors are
interpolated b etween the center of each face.
Color By Face samples fewer points, s o it is the
quicker method. On the other hand, results are
less accurate.
•
Co lor by Vertex—Colors are interpolated
between vert ices.
For each face, this method uses three points
instead of one, so it is slower but usually more
accurate. An exception can occur when an
object’s shadow falls between two vertices:
in such a case, the object should occlude
lighting, but because only vertices are taken
into account, the shadow is not calculated and
a“lightleak”occurs.