Archive for January, 2012



January 10, 2012

There’s a nice technique for detailing shop assemblies that I like that involves using Revit’s massing modeler.  I create the desired assembly using extrusion and void extrusions and then I capture the 3D isometric view of the image.  Revit will allow you to dimension, to a degree, in the 3D view so you can describe the assembly but has some problems with certain planes when dimensioning so you will have to annotate the image further in the detailing environment.

Revit will allow you to capture the image just make sure you reduce your window tight to the image you want, as shown above.  You’ll see why when we get to the capture settings.  To capture the image go the purple ‘R” (upper left corner) and select “Export>Images and Animations>Images”. as shown below.

You’ll get the following command window (below). Set your save path at the “Name”,  Now here’s why we pulled tight to the 3D view;  the export range is set to “Visible Portion of Current Window”  this will save you all kinds of headaches in avoiding oversized images or portions of your image being cropped by Revit’s export function.  I ramp the image size up to 1200 pixels to get a better resolution when I size the image down in the detail window. Set your desired format (Jpeg or BMP) for standard use in Revit.

You can now import the image into your detail using the Insert Tab > Image.  The image will come in oversized so you’ll need to resize it to the desired scale to work with your intended annotations.  Just select the image and click / drag one of the blue corner dots to scale.  You’ll probably need to add some additional dimension strings to compensate for what Revit couldn’t do in the isometric (note the dimension string tick size variation).  This makes for a great way to communicate the assembly by shortcuting the traditional orthographic approach.

One word of warning, keep your shaded isometric on the light side via the materials control interface where you construct the 3D model.  I’ve found that printing tends to darken shaded planes and can push what would be preceived as gray on your monitor to very dark grey on the print, potentially covering detail you want to show.  Also keep the 3D file you created of the assembly as you will inevitably need to modify it in the future.


April 7 2012 update:  When plotting under the “Settings>Setup” button dialog window set “Hidden Line Views” to Raster processing.  Otherwise your image files won’t print. (CK)

Exploded Path Lines:  You can’t draw in the 3D view, at least in the versions up to 2011 so an easy and accurate way to acheive the dashed lines of a layered component that has been exploded away to more clearly show the assembly is to duplicate the extrusion that you want to pull away and then expand the duplicate to bridge between the exploded position and the final in-place position.  Then over-ride the graphics setting of the duplicate to “transparent” and set the line value to “dashed”.  You’ll lose your hidden lines of the duplicate so go into wire frame and use the modify linework tool using the same dashed line to touch the hidden lines.  Then go back into the shaded view and the hidden lines will now be visible. (CK)