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aiOslShader: could not find include file: stdosl.h when using network path

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matthias.pichler2LM87
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aiOslShader: could not find include file: stdosl.h when using network path

Hey!

We recently tried using an aiOslShader in Maya, but came across an issue on some of our machines. This error kept getting raised when we tried to compile a shader:
```
# Error: Compilation Failed # # Error: C:\Users\sercan.topaloglu\<buffer>:1: error: error: could not find include file: \px\o\app\ext\maya_mtoa\3.3.0.0-pxo.2\platform-windows\maya-2018\bin\../osl/include/stdosl.h # Traceback (most recent call last): # File "c:\users\sercan~1.top\appdata\local\temp\rez_env_a3c3507c9829f2f226150cec3a1fe39a2ba89ace61240ea3aaf9983abe9b513e\mtoa\ui\ae\aiOslShaderTemplate.py", line 265, in <lambda> # cmds.button('compileButtonPath', label='Compile OSL Code', command=lambda *args: self.compiler(attrName, self.code_widget_path)) # File "c:\users\sercan~1.top\appdata\local\temp\rez_env_a3c3507c9829f2f226150cec3a1fe39a2ba89ace61240ea3aaf9983abe9b513e\mtoa\ui\ae\aiOslShaderTemplate.py", line 284, in compiler # cmds.error(oslMayaScene.compilationErrors) # RuntimeError: C:\Users\sercan.topaloglu\<buffer>:1: error: error: could not find include file: \px\o\app\ext\maya_mtoa\3.3.0.0-pxo.2\platform-windows\maya-2018\bin\../osl/include/stdosl.h #
```

After some troubleshooting, we figured out it works perfectly fine if the `maya_mtoa` package is cached locally and referred to with `C:\[...]\maya_mtoa\[...]` instead of `\\px\o\app\ext\maya_mtoa\[...]`.

Couldn't find a page where I can post an official bug report, so feel free to move this to it's appropriate place.

Cheers!
~ Matthias Pichler

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