We do most of our upfront work in Revit. Then we export the file out to .DWG. once in sketchup we import the .DWG file. after that we have to click on the group (has all the layers in it ) then create groups within the group. after all the layers are grouped we explode the combined group. then in each group layer we click on the group and send all elements to Layer0.
what we have left is all groups keep the parent layer, but when we click in the group everything is on Layer0. this keeps us from having a nested layer issue
Is there an easier way to do this?