8

Using the Polygon Counter Utility 645
CoordinateInterpolators. This applies to box,
sphere, cylinder and cone primitives only.
Materials
You can export only standard and multi/sub-object
materials, and only the following components of
the material:
• Diffuse,ambient,andspecularcolor
• One texture map, which must be in the Diffuse
channel
U se JPEG or PNG format for your
maps, because they are recognized by all
VRML97-compliant browsers and generally
create the smallest files. (Some older browsers
may recog nize GIF format and not PNG.)
Multi/sub-object materials export colors and
textures. If an object has a multi/sub-object
material with textures, it exports as separate
objects in VRML97, since VRML97 does not
support more than one texture map per object.
Texture maps slow down the browser and
increase downlo ad time. Use them sparingly.
• Shininess (but not shininess strength)
•Opacity
•Wireframe
Make sure that all large flat surfaces have enough
ver t ices in them that a few vertices can be seen
from all reasonable vantage p oints in your scene.
Some browsers cannot display textures on an
object where all of its vertices are outside the
current view p ort.
If you have s evera l li g hts i n you s cene, lower t he
default multiplier value on al l the lig hts in the
scene. Lights can oversaturate the scene and make
all your geometry wash out toward white. Always
add at least one camera and one light to a scene
exported to VRM L97.
Helper Objects
Inser t VR ML helper objects into your s cene i n
the top viewport. Yo u c a n i n s e r t V R M L h e l p e r
objectsinanyview,butifyouinserttheminthe
top viewport, they appear properly oriented in the
front viewport.
Using the Polygon Counter Utility
Whenproducingworldswithasmallnumber
of faces, use the
Polygon Counter utility (page
1–1254)
. The counter displays a dialog that shows
the number of polygons in the current scene, as
well as the number of polygons in the current
selection set. Use the spinners on this dialog
to set a budget for both of these values. A bar
graph changes from green to yellow to red as you
approach and exceed the allocated budget.
Procedure
To display the Polygon Counter utility :
• From the Ut ilit ies panel, click More and then
select Polygon Counter from the Utilities
dialog.
This opens the Polygon Count dialog for setting
your budget polygon count for selected and all
objects in the scene.
V RML97 Specification
You can find the complete VRML97 specification
at h
ttp://www.web3d.org/x3d/vrml/index.html.
This document describes the entire VRML97
language and provides technical details on the
behavior of exported VRML97 worlds.