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CAD Import - smooth segment edges

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    CAD Import - smooth segment edges

    Hi guys,
    when I import a sketchup model or other 3D objects, it has no edge-smoothness after rendering.

    It looks like the pictures "1_editing_view_in_revit.jpg" and "2_rendered_view_in_revit.jpg"
    I want it to be smooth like 3_editing_view_in_3ds.jpg and 4_rendered_view_in_revit.jpg

    Do you have some ideas?
    Attached Files
    Last edited by tvatvn; May 16, 2011, 05:20 PM.

    #2
    I don't know the exact term(s) for it, but it's the difference between how Revit & Sketchup handle their modelled geometries.

    I "think" it's because Sketchup uses faces and Revit uses solids - which is why there are widespread arguments for modelling natively within Revit - not only for visualisation purposes - but also on the account of you're making one program speak another language, which is never good for optimised (ie. processing) speed.

    Perhaps you could try different export options from Sketchup - or different import options in Revit to get a better result.

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      #3
      hi, it's actually not a sketchup-only problem.
      In the last teapott-picture, the teapot is created in 3ds max design. I then exported it as dwg and imported it in revit. It is the same result. There seems to be no edge-smooting...

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        #4
        I think that its probably because Revit can't interpret "smoothing groups" from imported geometry. Like with the example of the teapot in 3ds max the actual geometry of the teapot is what you get in Revit However 3ds max applies smoothing groups to the geometry and calculates how light would bounce off the teapot giving the smooth appearance.
        Increase the number of sides that the teapot has and you will get a smoother surface but at the cost of more faces to the geometry. There will be some point at which Revit will show the result to be pretty smooth but the size of the teapot in terms of faces or geometry will increase exponentially. You are better off recreating the geometry with a native Revit one. or try importing it to 3ds max, apply turbo smooth with 1 or 2 iterations (this will give the curves more resolution), and hope that your system can handle it. Still no guarantee though
        Last edited by JCM; May 16, 2011, 06:15 PM.
        Juan Carlos Moreno
        Store Designer & Merchandising Manager
        Sisley Cosmetics

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          #5
          The honest answer is one you wont like: Model it in Revit. Imported Geometry stinks for a BUNCH of reasons. There is a multi pager in the Family forum about it.
          Aaron "selfish AND petulant" Maller |P A R A L L A X T E A M | Practice Technology Implementation
          @Web | @Twitter | @LinkedIn | @Email

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