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In this case we want to change the default for the sunDirection to default to pointing up in the Z-direction. "name" should be the name of the Args file we want to override (this can also be the name of an OSL shader), follow by the parameters we want to configure. Note, the name of the json file itself in this case does not matter; as long as the first "name" matches an already known shader Args file it will work.

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