@gus r said:

This is the import settings. It's rather basic.

[attachment=0:1tjhg4zi]<!-- ia0 -->Dwg Import Settings.PNG<!-- ia0 -->[/attachment:1tjhg4zi]

Thanks for checking it out. My new model this morning looked as good as yours, I'm thinking the origin setting might have been the culprit. I'd read on other threads about sketchup not behaving properly when the model is placed really from from the origin. The last import I did, I checked all of those boxes except 'preserve drawing origin'. Perhaps 'merge coplanar faces' and 'orient faces consistently' should remain unchecked?

@dave r said:

@bsquared said:

Question though, for the parts of the model that I will need to redraw completely in Sketchup, is it better to leave the imported base as a component, unexploded, and just draw new lines and arcs over that information, so that I don't have issues with lines merging (getting sticky) with the base information?

Yes. This would be a good workflow once you've got what you need drawn in SketchUp, delete the CAD drawing component and purge unused components from the model.

Make sure you are creating the new geometry untagged. Once you've completed it, make a group or component to contain that geometry and give the group or component a tag if you wish so you can control its visibility.

I was just kind of throwing that idea out there, is that typically how one would model a parking lot? By keeping the base a component? Or is it better to explode it if the linework looks good, and just make the arcs continuous?

@gus r said:

Can you share a portion of that dwg here?

I've attached part of the dwg base.

new block.dwg

@dave r said:

If when you select it, the thing is shown as an Arc in SketchUp and the number of segments has a white background, you can edit the number to make it appear smoother. Otherwise you'll need to redraw them.

You might be able to convert a series or exploded edge segments into an arc using Lines 2 Arc from the Extension Store.

The general wisdom is to use your CAD import as a guide for drawing the geometry in SketchUp rather than trying to use the imported CAD geometry directly. It's not unusual for the imported geometry to have more problems than just the low res arcs.

Thanks, I made a discovery this morning with this model. I went back to the Cad file and made sure I didn't have any lines on top of other lines. I then started a new sketchup file, and imported the cad base without preserving the drawing origin (it was really far away before from the origin). One or both of these two things seems to have made a massive difference in the linework in Sketchup, much improved.

I've installed the lines 2 arc extension you mentioned and that does work ok.

Question though, for the parts of the model that I will need to redraw completely in Sketchup, is it better to leave the imported base as a component, unexploded, and just draw new lines and arcs over that information, so that I don't have issues with lines merging (getting sticky) with the base information? For example, the parking lot, the first thing I want to do is make the edge of pavement a continuous closed line so Sketchup can make it a face. Is there a better way to go about it?

My Sketchup knowledge is limited so I hope you guys will pardon my basic questions.

I'm importing a very large parking lot from AutoCad into Sketchup 2021 Pro. The parking lot contains tons of arcs. The arcs (smooth as silk in AutoCad) look very segmented and are unusable in Sketchup. Is there any way I can fix this issue so that the Arcs are smooth in Sketchup without redrawing all of the arcs?

From what I've researched online, I might be able to fix each one using entity info (haven't tried), but is there any way to do this globally after importing the file? Perhaps using an extension?

I'd really appreciate any help.