Hello G…good to be of any help.
Technically, you are not “making a layer Of the import”…
you are only making a layer for the Control of it…
it still resides on Layer 0.
All our lines and faces…
all entities, are BEST made on Layer 0…
and Kept there…!
Then…
Grouping or Component-Making…
can be “Assigned and Controlled” by You…to other layers
PS:
“Layers” in Sketchup… are “Mind-Control”…
Layers in Cad and Photoshop… are Matter-Control.
` i have a similar sort of issue . a project i am working on where the surveyor sent a file , all the lines are not in the same axis in autocad . so for obvious reasons after importing to sketchup the lines appear to be bizarre . dont seem to get it right even if i redraft the whole drawing. is there a solution …please help me out. working on a very tight timeline .
Here it is exploded and draped in a Sketchup 2014 file.
To avoid the bugsplat during the explode operation I had to temporarily turn off of Edges, Profiles, Extension, and Endpoints in the Styles editor. Mostly likely there are still problems with the file (tiny edges perhaps) that you’ll have to sort out with a different set of extensions.
One “flattening” trick that SketchUp Pro users can use is to go to top view, select parallel projection and export to 2D DWG to full scale, then re-import the DWG you created.