Does Sketchup get confused as a model goes on a long time?

Does Sketchup get buggy or is it my imagination? I’m a beginner but I have an advantage (I thought), I’m 68 years old and I own a construction company. I’ve spent a life reading blueprints, I have designed a lot of places but I didn’t even own a drawing board. I’m also decent on a computer although I’m falling behind on new tech.

I’m moving to Costa Rica and want to design my own house…so I began and since I haven’t figured out how to use groups (yet)…so I’m saving one model and continually building on it…but…it’s starting to act buggy …such as not allowing me to erase doorways after the door is present

Is this normal and how do I stop it


I suspect it’s less than good model management. Share your SketchUp file so we can see what you’ve got going on.

I guess your model is a bit messy, using groups and components are a must when you model on sketchup, components can make your file lighter, and using models from the 3D warehouse directly in your model could make your file to get heavy and laggy very easily.

What button do I hit to attach file./…not a big forum guy…I’m kinda clueless

If the file is bigger than 16 MB upload it to a file sharing service and post the link otherwise use this button

I’m sorry for my ignorance but I don’t see any of those icons on the forum…I don’t even have a smiley

I see it

CR original basic 2.skp (113.6 KB)

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Well, there isn’t much to your model. Certainly nothing that should make it behave strangely. You really do need to learn about using groups and components. All this loose geometry won’t help. Door swings should be components separate from the floor plan. If I were going to create this as a model I would first draw the perimeter and give it some thickness to create the floor. That geometry would be grouped. Then I would add the walls on top of it.

Save labels for LayOut. Certainly at this stage in your model there’s no need to label the rooms.

Start with and get the fundamentals down.

Here I’ve cleaned up the geometry of the walls and also extruded them to 3D. I did not replace the door swings nor did I put headers in since I don’t know how tall the doors are to be. This should give you an idea, though.
CR original basic 2.skp (124.5 KB)


I think you misunderstood my intentions. As rudimentary as this is, I don’t need much more. The outside parameters are 60 x 60 with a open garden in the center. Simple Alaskan slab and my biggest decision is using block walls versus sold cement. I have the Simon forms, but block is easier to wire.
Most Ticos can’t read blueprints anyway. I’ve always spent a lot of time in CR and simplistic rules the day.

I will take your advice and learn groups

Thank You

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If all you need is a 2D plan there’s no need to be using a 3D modeling application. No matter what application you use, though, you need to learn to use it correctly. Take the time to go through the learning materials that are available to save yourself frustration.


Here is Dave’s model as a 2020 file. Aside from the many other things he did to your plan, notice how he has the model in Perspective. That’s worth getting used to soon, it will end up feeling more natural than parallel projection.

CR original basic 2-2 2020.skp (149.4 KB)

Seems like everything is 3D. I didn’t want a 3D and will accept suggestions for a hearty 2D. Maybe I’ll try the 3D after I learn more. I am currently trying to use every tutorial I can find but I do look for beginner tutorials that fit my 2D needs. One of those tutorials was a female college professor who said use parallel because it was harder to make mistakes and helps keep everything more square.

Do I download and use that file you posted?

And thank you for your advice

I finally got it downloaded and opened…that’s wild…I love it

I would disagree completely. I think making mistakes depends entirely on your understanding of and care with what you are doing. And in SketchUp keeping things square is a matter of using inferences and inference locks correctly. Neither of these is affected by the projection you use. Though, personally, after using perspective for some time parallel looks weird to me except if I am doing an orthographic view (which is not how I model).


I also use parallel projection most of the time but the reason isn’t the one given by the college professor, that actually makes no sense, it’s up to you and how you feel comfortable modeling, I have shortcuts assigned to change from perspective to parallel projection, it helps me to visualize the model better, it also depends on your workflow and what you’re modeling.

Her line of thought is that the biggest problem students face is caused by a line being off a hair in the beginning and that makes everything that follows incorrect and the student can’t figure out why things don’t jive melting their poor little brains.

But I’ll try both and see what I like.

While it is true that small errors in a model tend to spread by contaminating things drawn later, once again I would say that the problem begins with failing to use inferences and the measurements box correctly, not from your choice of projection.


Do you see the world in 2D like the ancient Egyptians? SketchUp was designed to be used in Perspective the way most people see the world.

I agree with @slbaumgartner. I’ve only been using SketchUp for 20 years and a few months but I’ve seen more errors in modeling created by users who insist on working in Parallel Projection than those working with the camera set to Perspective.

I’m thinking that if you took a SketchUp class from someone who did not teach you about using inferencing, groups, and components, you should request a refund.