Replace multi-file scene with multiple stl files

```
Hello,
I followed the issues item to add multiple stl files into a single view, which
works fine.
What I need to do next is to allow for a checkbox click to trigger the
replacement of the stl files with a different set of files. I found the issue
where a single file is replaced, but I need to replace the scene with multiple
files.
Some parts of the function are working since when I change the
colors[newLoaded] to newLoaded+1 I get a color change, but I cannot replace the
actual files.
Thanks

```

Original issue reported on code.google.com by `madb...@gmail.com` on 19 Jun 2014 at 9:09

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