Autodesk 12812-051462-9011 User Guide 3 - Page 1935

of each imported object is based on the AutoCAD object's layer. The imported object name has a "Layer:" prefix and is followed by the layer name. For example, all AutoCAD objects residing on the layer Walls become part of the Editable Mesh named Layer:Walls after they are imported to 3ds Max. Each block is imported separately as a hierarchy, with the block itself as the parent object and its constituent parts as child objects. The child objects of the block are combined by layer. ■ Layer, Blocks as Node Hierarchy, Split by Material This works the same as the Layer, Blocks as Node Hierarchy option, with the following additional functionalities: the combination of non-block objects by layer, followed by material and support for multiple materials assigned to ACIS solid and polymesh geometry. ■ Non-block layer combination For example, take an AutoCAD file with six objects in layer A: three have a Brick material and three have a Stone material. Using this option, this file would be imported in the form of two objects, or nodes, one containing the Brick material and the other with the Stone material. Each block is imported separately as a hierarchy, with the block itself as the parent object and its constituent parts as child objects. The child objects of the block are combined by layer. ■ Multiple material support On import, ACIS solids and polymesh geometry can support multiple materials. For polymesh geometry, one material is supported per face. For an ACIS solid, if the solid has more than one material associated with it, a multi/sub object material is created that contains the materials used. If the solid has only one material associated with it, a standard/architectural material is assigned instead. NOTE Multiple material support for ACIS solids applies to DWG files imported or file linked from Revit Architecture 2008 or AutoCAD Architecture (formerly Architectural Desktop or ADT) 2007 and later. NOTE This derivation method is intended for use with AutoCAD 2007 (and later) format files. Using this method with DWG files created with previous versions of AutoCAD may result in data loss. ■ Entity, Blocks as Node Hierarchy Every imported object not in a block is represented as a separate object in the 3ds Max scene, without regard to 7190 | Chapter 23 Managing Scenes and Projects