@smicha said:

Use vertex tools and make planar all lines.

You mean adjust the individual vertexes on every line? I'll see if I can find the vertex tools plugin, its one of ThomThom's isn't if? I assume there is a command to make all vertexes co-planar as oppose to having to individually select....

Frankly, I'm coming to the conclusion that importing .dwg information into Sketchup is broken, or at the very least pretty buggy. I made another really simple .dwg file to test, just some circles and polylines. All 100% flat, all co-planar etc etc. I tried with all as polylines, I tried breaking lines up into individual segments, I tried various flattening commands (all data is reporting a z value of 0).

Import into Sketchup and after running all the intersect with model commands ultimately I'm left with this:

All the selected faces select with one click. They're not grouped, stray lines tool reports no stray lines so there isn't any gaps meaning they're joined up - its bizarre and frankly not good. And this is with an utterly simply CAD plan.

And apologies, I can't upload any CAD data due to client copyright issues. If you have the software to open a CAD file I might upload though, you can draw some circles and lines and import that to Sketchup and see if you can recreate the issue yourself.

Thanks for the reply - I'll try Thomthoms edge tool and see if that helps.

I'm having problems to be honest. I bought the pro version purely to be able to import .dwg data on the assumption that it would be quicker workflow, but it would appear that Sketchup is introducing errors on the import. Even really simple overlapped shapes drawn in CAD that are 100% snapped correctly, 100% flat still don't intersect correctly and make faces in Sketchup. Running the stray lines tool shows up myriad areas where lines suddenly don't join properly - these errors simply aren't in the original CAD file, so the only assumption is that Sketchup is not particularly good at importing the data.

A shame.

Gentlemen, thank you for your prompt replies.

Charly, I've run the StrayLines plugin, along with the MakeFaces plugin by the same author and I'm surprised by how many tiny little errors it showed up in the model - essentially it labels those areas which if I correct, suddenly I can bound faces and then push/pull as required. So thanks, this plugin (although not the instantaneous workflow I was imagining with .dwg import) has saved the day.

It is curious though - I'm religious with my snap settings in AutoCAD, I don't leave stray lines and I always ensure my lines are co-planar, so these myriad errors in the imported Sketchup data is odd because the errors are not there in the original CAD file.

Hi there,

This is driving me potty - when importing a .dwg to Sketchup Pro I'm not able to intersect the lines with a flat plan or close various faces by adding a line etc. The lines remain slightly thicker in places to denote a non bounded shape and I can't do anything with the model without redrawing, which defeats the entire point of importing the drawing file from CAD.

See attached image, you can see that certain shapes which are bounded on all sides are still selecting as part of a whole, meaning I can't simply extrude walls etc up.

Is this a bug? Is there a way around this?

I should point out that my .dwg data has been flattened to 2d in AutoCAD.

I've tried the 'flatten' plugin, which doesn;t make any difference.

Any help appreciated,

Thanks,