AutoCAD Linetypes vs. Revit Line Patterns: What Transfers and What Does Not

AutoCAD linetypes and Revit line patterns both create repeated dashes and spaces, but they are not interchangeable resource systems. Revit does not treat a complex LIN library as a native collection of equivalent line patterns.

Separate three workflows: displaying a linked or imported DWG, creating native Revit graphics, and mapping Revit linework during DWG export.

AutoCAD Linetypes and Revit Line Patterns Are Different Systems

AutoCAD assigns a named linetype to layers or objects and stores the loaded definition in the DWG. Revit assigns a line pattern through line styles, categories, subcategories, and view controls. Similar appearance does not mean identical data or behavior.

How AutoCAD Linetypes Work

Simple Dash-Gap Patterns

A simple LIN definition repeats drawn, blank, and dot elements along object geometry.

Complex Text and Shape Linetypes

Complex definitions can insert text through a text style or symbols through an SHX shape file. Rotation, scale, and offsets are part of the descriptor.

LIN and SHX Files

The LIN file is the source library. The DWG stores loaded definitions, while complex shape or font resources can remain external dependencies.

How Revit Line Patterns Work

Dashes, Dots, and Spaces

Native Revit line patterns are built from a sequence of dash, dot, and space segments appropriate to Revit’s graphic system.

Line Patterns vs. Line Styles

The pattern defines repetition. A line style combines the pattern with line weight and color and is used by detail, model, or symbolic linework according to context.

Category and Subcategory Control

Many Revit elements receive line appearance from categories, subcategories, object styles, and view overrides rather than a direct AutoCAD-style entity property.

What Happens When You Import or Link a DWG

CAD Layer Display

Revit exposes imported CAD layers as imported categories that can be controlled in the view. The linked DWG remains CAD content rather than being converted into native Revit line styles automatically.

Imported Line Appearance

Basic dash-gap appearance may be represented, but complex text, SHX shapes, scale behavior, and object-specific results should be treated as compatibility risks.

View-Specific Visibility Controls

A linked CAD file can be hidden, halftoned, or overridden by layer in a view. This makes it useful as a coordination background but does not create reusable native Revit patterns.

Control Imported CAD Lines in Revit

Object Styles

Use imported-object settings for project-level control where appropriate. Confirm whether changes affect all views or only a selected context.

Visibility/Graphics Overrides

Use view-specific settings to control layer visibility, color, weight, or line pattern for coordination and documentation.

Imported Categories

Expand the imported or linked file in the view controls and manage individual CAD layers. Keep layer names meaningful before export from AutoCAD.

What Transfers from AutoCAD to Revit

Basic Line Appearance

Simple linework and recognizable dash-gap representation generally provide the best chance of a usable linked background.

Layer-Based Organization

CAD layer names are valuable because Revit can expose them for imported-category control.

Simple Pattern Representation

A simple pattern may look sufficiently similar for coordination, but test at the intended Revit view scale and print output.

What Does Not Transfer Reliably

Embedded Text

Text inserted by a complex linetype is not equivalent to native Revit annotation. It may be simplified, altered, or lost as semantic text.

SHX Shapes

Custom repeated symbols depend on AutoCAD resources and have no guaranteed one-to-one native Revit equivalent.

Complex LIN Parameters

AutoCAD’s R, U, S, X, and Y behavior is not a native Revit line-pattern parameter set. Recreate critical graphics with Revit-native tools.

Export Revit Linework to DWG

Open the DWG/DXF Export Setup

Create or edit an export setup rather than relying on an unknown default. Coordinate layers, colors, line patterns, units, and text settings.

Map Revit Patterns to DWG Linetypes

Use the Lines mapping controls to associate Revit line patterns with appropriate DWG linetype names.

Load Linetypes from a LIN File

The export setup can reference a LIN file so the desired AutoCAD names are available for mapping. This is an export configuration step, not a general native Revit LIN import.

Configure Export Linetype Scale

Test exported DWGs at the required units and sheet scales. Revit and AutoCAD use different graphic contexts, so numeric equivalence should not be assumed.

Create Equivalent Native Revit Line Patterns

Rebuild essential simple patterns with Revit’s dash, dot, and space segments. For utility text or repeating symbols, use appropriate Revit families, annotations, detail components, filters, or line-based content rather than forcing an AutoCAD complex linetype concept into Revit.

Coordinate AutoCAD and Revit Line Standards

  • Maintain a mapping table between Revit pattern/style names and DWG linetype names.
  • Use stable CAD layers for linked backgrounds.
  • Limit complex LIN patterns in files intended for Revit coordination.
  • Define which system is authoritative for each deliverable.
  • Include unit and scale assumptions.
  • Test export setups after Revit or AutoCAD upgrades.
  • Use the company standard framework for governance.

Recommended CAD-to-BIM Testing Workflow

  1. Create an AutoCAD test DWG containing simple, text, and SHX linetypes.
  2. Link it into representative Revit views.
  3. Test imported-category visibility and overrides.
  4. Create equivalent native Revit line patterns where required.
  5. Map Revit patterns in a controlled DWG export setup.
  6. Export to DWG and compare names, scale, and printed appearance.
  7. Repeat at multiple view and sheet scales.
  8. Document unsupported complex patterns and approved replacements.

Related Linetype Guides