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Thread: DWG to PNG to RVT?

  1. #11
    Forum Addict GMcDowellJr's Avatar
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    Quote Originally Posted by cellophane View Post
    I have it saved. At least one of them.
    https://www.revitforum.org/architect...tml#post215047
    Of course you did!

    It's Stafford's comment that has me rethinking workflows. I was "fine" with fixing the DWG extents before linking and not picking lines nor both line end points but now... damned if I do, damned if I don't.

  2. #12
    Moderator cellophane's Avatar
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    Quote Originally Posted by GMcDowellJr View Post
    Of course you did!

    It's Stafford's comment that has me rethinking workflows. I was "fine" with fixing the DWG extents before linking and not picking lines nor both line end points but now... damned if I do, damned if I don't.
    Same here. Unfortunately the folks that pay the bills also refuse to do anything other than trace the CAD because "it's already there, why redo it?"

  3. #13
    Forum Addict GMcDowellJr's Avatar
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    Estimate the amount of time "saved" vs an assumed amount of time dealing with it later (including reduced performance) and see if that helps change minds... probably won't (they won't believe you) but it's all I got!

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    Forum Co-Founder Twiceroadsfool's Avatar
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    Quote Originally Posted by Tim123 View Post
    We find that we still need to bring in CAD drawings. Not all of our consultants use Revit yet, so we need to bring in their CAD drawings for coordination. Sometimes the existing building only exists as a CAD drawing so we use this as a starting point to model the existing (making sure that the lines are not slightly off axis). We also need to link in surveyor’s drawings to create the topo, set the coordinates and true north and check the elevations.

    I would be interested to know what database issues you have with linked DWGs? Linked drawings can be controlled and easily deleted from the database, so when we are finished with we remove them from the project. We also place them on a separate workset so that they don’t get in the way all the time.

    If you are using the CAD specifically for visual effects then your suggested workflow may be worth considering, but I think that you will be introducing other problems. The CAD drawing will be way leaner than the image as it is vector based, and the image will be very difficult to scale accurately.

    I’m with you on moving on from CAD, but currently we have to deal with them – we don’t have any problems if we do this in a controlled way. When users import a DWG without checking ‘Current View Only’ it creates issues (therefore banned by our protocols), but I can still find them and remove them from the project.
    With respect: You not having the problem (read: You not realizing you have the problem) doesnt mean the problem doesnt exist. It has, and it does.

    Ive never personally experienced Cancer, either. That doesnt mean it doesnt exist, or that it doesnt hurt people every day.
    cellophane and GMcDowellJr like this.

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    Forum Addict GMcDowellJr's Avatar
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    To report back on the trial -- so far it seems to be working okay. I haven't gotten the workflow to print from AutoCAD to PNG nailed down yet but provided the image resolution is high enough it prints out alright. If you zoom in on the PDF you can see the aliasing for sure but in a paper print it all but goes away. Now to convince management. Wish me luck!

  6. #16
    Moderator DaveP's Avatar
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    Not to throw a huge monkey wrench into your idea, but you do know that "PDF Underlay" has been marked as:
    Accepted Revit Idea (Some ideas may be available for testing in Revit Preview)
    in the Revit Roadmap, don't you?
    https://blogs.autodesk.com/revit/201...-january-2019/
    (Not that PDFs might not have their own issues)
    Last edited by DaveP; February 12th, 2019 at 09:18 PM. Reason: typo
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  7. #17
    Forum Addict GMcDowellJr's Avatar
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    I did not. Good to know though. It would definitely speed up this process. Thanks!


    Sent from my iPhone using Tapatalk

  8. #18
    Moderator cellophane's Avatar
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    Quote Originally Posted by DaveP View Post
    No t throw a huge monkey wrench into your idea, but you do know that "PDF Underlay" has been marked as:
    Accepted Revit Idea (Some ideas may be available for testing in Revit Preview)
    in the Revit Roadmap, don't you?
    https://blogs.autodesk.com/revit/201...-january-2019/
    (Not that PDFs might not have their own issues)
    At what point will people realize that buildings are built based on the numbers on the page, not the dimension of the object on the page? Same argument that occurred when it was discovered that Autobad could convert a PDF to lines...

  9. #19
    Forum Addict GMcDowellJr's Avatar
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    Quote Originally Posted by cellophane View Post
    At what point will people realize that buildings are built based on the numbers on the page, not the dimension of the object on the page? Same argument that occurred when it was discovered that Autobad could convert a PDF to lines...
    Well... considering framers in our projects are using DWG exports to layout walls, maybe never!

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    Quote Originally Posted by Twiceroadsfool View Post
    With respect: You not having the problem (read: You not realizing you have the problem) doesnt mean the problem doesnt exist. It has, and it does.

    Ive never personally experienced Cancer, either. That doesnt mean it doesnt exist, or that it doesnt hurt people every day.
    I am aware that this can cause problems - I'm simply pointing out how we mitigate it, as at this stage we have no choice but to use DWGs during our workflow. I've found that when we adhere to these workflows we seldom have problems that can be linked back to the DWG, which we remove after we're done. The off-axis warnings that I find in our models are not usually CAD linked - it's possible to generate off-axis lines in Revit all by itself. You're telling me that I have the problems, but I'm just not aware of them. Well, thanks for pointing that out, but I don't think that's the case.

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