Shader Naming Conflicts: How to Import/Reference and Preserve Shaders

[adam-martin--3]

When importing and/or referencing individual scenes into a master scene, my shaders get dumped or overwritten.  (Ex: An object A imports with shaders intact, and then later objects import with the same shaders used in A, losing their own attributes.)  How do I import/reference multiple scenes within a single master scene while preserving shading that was built within each individual scene?
I have attempted to rename the shaders both inside of their own scenes prior to import, and within the import settings <> to no avail.  I am told I cannot rename a read-only node, etc.

Also, I have been looking in the $150 worth of books I bought and through a number of Google searches to learn the difference between referencing and importing a scene.  Can anyone provide a link that would provide some useful reading material on the topic.  Is there a benefit in this situation to referencing over importing or vice versa, or is that a different topic?

[joojaa]

Open import options ( ) and unchek Remove duplicate shading networks, and chek use namespaces

[adam-martin--3]

Thanks for your response, but I am still having the problem even with those settings.  Below is a link to an image depicting the problem.http://www.blueapplestudio.com/random/ShaderProblem.png

I have two scenes, one of a building and one of a giant cat.  Both look fine in their scenes individually.

When I create a fresh scene and import the building, it looks fine.  Then, when I import the cat, the cat adopts the Lambert shader that I have assigned to part of the building.

Any other thoughts?

[adam-martin--3]

Note that the issue seems to be happening with a Lambert shader, and that it doesn't happen with all imported objects.  At the below link there is a scene where I have imported 4 items: building, mailbox, lampPost and giantCat.  
http://www.blueapplestudio.com/random/Shaders2.png

Everything except the cat looks fine.  Does there seem to be a naming problem with the cat or building's shaders?  Did I use a Lambert I am not supposed to use?

[joojaa]

  Did I use a Lambert I am not supposed to use?

The default shader aka "lambert1" is a no no*. Its always implicitly assumed to be the same on all platforms and should never be changed, or used for that matter for anything other then things that don't have any specific reason to look like anything specific like things you haven't finished working on (you might include some helpers to it but that's it).

Open the scene before import and duplicate the shader then reassign it to your cat then import.

*Same applies to the cameras persp, top, front, and side they also wont be imported because they are assumed scene specific. So they are assumed to be working with only things that aren't really part of the scene when imported.

[adam-martin--3]

That solved everything, thank you.