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Import 3D Warehouse models into Maya, cleanup imported models


Go to SketchUp 3D Warehouse website, you will need a SketchUp account.
Pick any 3D Model and select Download Model
Select COLLADA File .dae
If there is not an option for .dae, read the file into SketchUp then save to .dae

Unzip the file from your Downloads directory.
(PC Right mouse over file, choose Extract All...)

In Maya
Choose File->Import...  Find your .dae file
The file might be scaled extra large, you might not see it unless you dolly way out.
Select the parent, (Select a part, use the arrow up key a couple times to select the parent.)
Scale the model down to .0825 to match Maya coordinates
Move the model close to 0,0,0
Center the pivot, and move the pivot to the ground

Select all the chair parts using Select by Object Type mode  selection
Choose Edit->Unparent
to separate the parented duplicates from the original group
Select Edit->Group to form a new parent over the parts,
You can delete the excess parts, camera and curves, delete the group named SketchUp

Select all the objects
     Select Edit Mesh Merge->option
          Use a very small Threshhold
How to turn off component mode
     Use Right mouse choose Object Mode

Choose Mesh->Cleanup...option
     Select Lamina faces (faces sharing all edges)

The shading may appear to be strange
Select all the objects
Select Mesh Display->Unlock Normals

Create new shaders or turn down the Ambient Color to black on the imported shaders.
If objects appear black, select Mesh Display->Reverse
Select Edit->Delete by Type->History

Make sure there are no duplicate objects.