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590 Chapter 20: Managing Scenes and Projects
Geome try group
Rotate model—Exports the geometry to match its
orientation in 3ds Max.
Faces—Choose whether the mesh faces are stored
as triangles, quadrangles, or polygons.
Texture coordinates—When on, the texture
coordinates are stored with the exported file.
When you import the file in another application
you will be able to use this information if it is
supported.
Normals—When on, the normal information (page
3–980) for the mesh is stored.
Smooth groups—When on, the informa tion about
color transition between groups is stored. See
Viewing and Changing Smoothing (page 1–167).
Vertex scale—Determines the scaling for the
contents of the OBJ file. The default value of 1.0
means the exported file wi ll have the same scaling
asthesourcefile.
File group
# of Digits—The precision of the exported vertex
data, as expressed by the number of decimal places.
Co mpress numbers—When on, trai ling zeroes are
eliminated from decimal fractions. This makes
the exported file smaller without sacr i ficing any
precision, but can cause compatibility issues when
importing with certain programs. If you’re unable
to import an OBJ file, make sure this option is off
and export again.
Rel ati ve vertex number s—Causes face vertex
indices in exported files to be expressed as
relative (i.e., negative) numbers. This can cause
compatibility issues when importing with certain
programs. If you’re unable to import an OBJ file,
make sure this option is off and export again.
Cancel—Cancels the OBJ export.
Expor ting Wavefront Material
(MT L ) Fil es
File menu > Export > Wavefront Material (*.MTL)
The ASCII-based MTL format m akes it possible
to exchange graphical data between many
applications. The MTL format uses floating-point
numbers to define each material’s ambient, diffuse,
and specular colors, as well as alpha and shininess
values. Optionally, the MTL files can also specify
texture-map filenames.
Interfa ce
Sour ce—C hoose whe ther to export only materials
used in the current scene, or the entire material
library.
Ex por t maps—When on, any map files used in
exported materials are referred to in the exported
MTL file. File paths are not included, so map files
must be available upon subsequent import ing.
File group
# of Digits—Specifies the number of decimal places
for export ing color values such as ambient and
diffuse in floating-point format.