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1031

Dynaflector 1025

Keep the following in mind when you are creating

your DXF geometry, and when you are deciding

whether to convert by layer, color, or entity:

• With AutoCAD Release 12, if you are using

the AutoCAD Advanced Modeling Extension

(AME), u se the SOLMESH command on your

AME models prior to saving the

.dxf

file.

• Af ter import ing a DXF file, you might want to

divide the resulting 3ds Max file into smaller

objects.

Entities that are frozen or turned off are ignored.

The successful unification of face normals depends

on the welding of coincident vertices. Sometimes,

depending upon the precision of the model as it

was created in AutoCAD, the vertices may not

becloseenoughtobeconsidered"coincident."

They wi ll not b e welded, and the faces will not be

properly unified. In this case, increase the Weld

Threshold value in the Import DXF File dialog.

Converting by layer can result in objects consisting

of many

elements (page 3–1027)

. In certain cases,

some of these elements m ay have all of their face

norma ls flipped the wrong way. You can detect this

in the software by turning off Backface Cull in the

Display panel, or by rendering the objects. Use the

Normal modifier (p age 1–738)

to correct this.

If you do not want to flip normals, you can either

use 2-sided materials, or turn on the Force 2-Sided

option in the Render Scene dialog.

If you are loading a large scene containing

thousands of entities (such as 3D faces) and have

chosen to load an object by entity, the conversion

can take a long time. It also produces a huge

number of objects to handle in the software. To

avoid this, organize your DXF file so that these

kindsofentitiesaregroupedbylayer,thenmake

the conversion by layer rather than by entity.

Dynaflector

space warp (page 3–1108)

that lets particles

affectobjectsinadynamicssituation.

Three kinds of space warps are in the dynaflector

category:

PDynaFlec t Space Warp (page 2–77)

SDy naFlect Space War p (page 2–81)

UDynaFlect Space Warp (page 2–82)