Getting Rid of Ghosting Lines in Sketchup

Featured image_Getting Rid of Ghosting Lines in Sketchup

For this Sketchup Q & A we’re going to be answering a question from “sampsans” on Reddit who asks how to get rid of ghosting lines in Sketchup. These are essentially lines that intersect with a solid object and therefore show up on the other side. It can be common on the exterior of buildings where the flooring and wall meet.

We created a simple model in Sketchup to represent a building flooring and exterior wall. As you can see, the lines from the flooring show up on the exterior of the wall. You can fix this by push/pulling the exterior wall out by 1”, but then you’ve changed the dimensions of your building and it may interfere with other aspects of the model.

ghosting lines in Sketchup
extrude to hide ghosting lines

If you try to push the wall out by a smaller amount, such as 1/16”, the ghosting lines may disappear, but only in certain views. For example, when we tried using this method, the lines disappeared in the front view but came back when we viewed the model from the side.

As you can see, this method is a quick fix, but may not be ideal. We’re going to show you how to get rid of the lines while still keeping the flooring flush with the exterior wall.

How to Hide Ghosting Lines

Make Group. The first thing you want to do is to make sure that each object is a separate group. Select the flooring and right-click. Select “make group.” Repeat this step for the wall.

Hide. Double-click into the flooring group. Select one of the lines that are showing on the exterior wall. Right-click and select “hide.” Repeat these steps for the other line.

hide ghosting lines

Divide. If you also have lines intersecting with the corner of the wall, you just simply need to divide them into separate sections. Double-click on the flooring group. Draw a line from the corner where the flooring and the wall meet up to the top of the wall.

draw vertical line to divide ghosting lines

Select the line that intersects with the corner. Right-click and select “hide.” You can also hide the vertical line that you drew. Repeat these steps with the bottom line of the flooring.

hide ghosting lines on corner

Now you can see that the flooring still extends all the way through to the outside of the wall, but there are no ghosting lines showing up on the other side! If you go to another style that shows hidden lines, you can see that the lines still do not show up. Go to the “styles” tab of the default tray. In the “edit” tab you can find a variety of styles to choose from.

final wall with no ghosting lines

With these simple tricks, you’ll be able to create smooth transitions between planes and not worry about having to adjust the thickness of any of them! If you liked this tutorial, be sure to check out the rest of our articles here. What other issues do you need help solving in Sketchup? Let us know in the comments, we would love to help out!

Happy Hacking!


  1. allstarcarpetandtiles June 24, 2019 at 10:31 am #

    Great tips. I’m bookmarking this page. Its a great resource to keep. Thanks for sharing.

  2. hamzakhan17826 May 19, 2019 at 7:16 am #

    Ok sure, I will follow your steps before going to do exams. I hope your article will help me more.

  3. karlmistos May 14, 2019 at 10:41 pm #

    Thanks for sharing this. I’ll definitely share this with my classmates at de la salle zobel.

  4. classboat01 October 17, 2018 at 7:37 am #

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  5. mikemoreno September 5, 2018 at 3:48 am #

    thank you very much, verry helpfull…

  6. jogesh12345 August 14, 2018 at 1:55 am #

    Very effective and informative article.Thanks for sharing such an important tutorial.

  7. FLMIMA August 11, 2018 at 9:20 pm #

    Really helpful website

  8. Rumi July 15, 2018 at 7:16 am #

    I feel very grateful that I read this. It is very helpful and very informative and I really learned a lot from it.

  9. RJennings April 28, 2018 at 6:12 pm #

    Thank you for this website. The practice questions are helpful.

  10. Scott March 22, 2018 at 1:50 pm #

    Taking this test on Saturday. Last 4.0 exam to complete for the trio, then on to 5.0. This site is my go-to place when organizing what materials I’ll be studying

  11. shozab January 30, 2018 at 2:22 pm #

    Hi , very good article.

    thanks for sharing, keep up the good work

  12. dyba January 27, 2018 at 1:08 am #

    Good advice. Best of luck to all!

  13. KendraShirley January 16, 2018 at 4:04 pm #

    This is my favorite site for practicing for my tests! Great advise and super helpful.

  14. reximagetrim January 16, 2018 at 10:37 am #

    Nice post to read. A complete guide that can help all of us.

  15. tylerstockholm December 17, 2017 at 9:37 pm #

    Nice one… very helpful! Thanks!!!

  16. Aartiwalvekar November 21, 2017 at 8:56 am #

    Nice post

  17. Aartiwalvekar October 9, 2017 at 9:45 pm #

    Great post!

  18. Tony August 30, 2017 at 7:07 am #

    In the NCARB ARE 5.0 handbook they reference Fundamentals of Building Construction: Materials and Methods in both of their example questions for cost estimating. Unfortunately there isn’t a specific chapter on cost estimating, it’s woven throughout the content.

  19. Spencer August 30, 2017 at 1:15 am #

    What is the best reference for cost estimating for PDD.

  20. Amy July 26, 2017 at 3:24 pm #

    Thanks! Great advice

  21. Tony June 29, 2017 at 7:23 am #

    Deciduous trees should only be used for shade (especially in temperate climates). Deciduous trees lose their leaves in the fall and will have little protection against wind in the winter when it is most needed. Likewise, the leafless trees allow solar heat gain in the winter when it is desired, and shade in the summer.

    Coniferous trees are only to be used to block wind and views. Since they don’t lose their needles, they work great for these two items year-round.

  22. Shahid Logan June 28, 2017 at 4:50 pm #

    Hello. My name is Shahid. This comment is for anyone who would like to reply. On the Siteplanning test. To block the wind, can you use a Deciduous tree or must you use a Coniferous tree?

  23. Mike January 4, 2017 at 11:04 am #

    Hi Tony,

    I need to take 5.0 PPD & PDD. Do you plan on posting notes such as “Caroline’s Notes” that you had posted for the various 4.0 exams for either of those sections? I found those notes to be some of the best resources in studying for the 4.0 sections. If so any idea when? Thanks

  24. Stephen October 17, 2016 at 9:30 pm #

    Hi Tony,
    Any updates on the SS exam ? If there’s an expected release date ? Thanks

  25. DesignerHacks October 4, 2016 at 12:11 pm #


    We are releasing practice exams for the SS exam later this fall.


  26. Paige October 4, 2016 at 11:34 am #

    Will you have SS questions on here at some point?

  27. Daniel September 9, 2016 at 8:47 am #

    Great post, very helpful with the lists of suggested materials, I just passed CDs in July and am taking PPP in November so I definitely needed the list.

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