How to Resolve Graphic Errors while linking CAD details to Revit

[matt2W24B]

Hey all,

Our firm uses a combination of autoCAD and Revit to produce construction drawings for projects. We have an autoCAD library/template file which is monitored and updated as needed by management. When we need to use CAD details, we will typically copy details from the template file as needed and paste them into a separate, project specific CAD file which will get linked to revit.  

This has proved to be the most efficient method as far as updating our drawings, and being able to export the whole set out of Revit (as opposed to exporting detail related sheets from CAD, and the rest of the set from Revit)

The main issue we're having is the loss of graphic quality once linked from CAD to revit. Lineweights are diminished, hatch scales get distorted to the point where they are illegible, and text boxes jog around if they are not properly justified. 

I attached two samples below- one export from CAD, and one export from Revit, using the same CAD file as a link. 

Any tips are appreciated, thanks!! 

[syman2000]

It really depends on how well the DWG is constructed. Revit have limitation when it read DWG file.

1. Revit read text based on Property>Justification. If you use Mtext editor and adjust the text justification there, it cause your text to jump all over the place.

2. Revit don't care about polyline width. Whatever bold line you use with polyline width, Revit will treat it as line. So you have to use AutoCAD lineweight so it will show up correct lineweight in Revit

3. Revit don't read certain hatch smaller than the screen (See PDF print). Regardless the scale and lineweight, Revit will treat dense hatch as solid. Most often it is easier to not show hatch in AutoCAD and place hatch in Revit.

[hmunsell]

Due to all the things that can happen when bringing CAD into Revit, We have actually taken the exact opposite approach.  We have all or our standard details in Revit as Detail Views. If they are needed in CAD they are exported from Revit to DWG using a custom Named Export Setup to control the layers, Colors, Line Types, Fill Patterns, etc..... 

We will link Background plans as needed, but we don't link Details from AutoCAD. In the rare cases we don't already have it in Revit, we will import details into Revit. I have strict instructions for my staff on how to import and clean up the details so they are Revit content. I know that doesn't solve your current issue, but its somthing to think about....