@Biscuits DzFire on the Daz forums actually posted an export preset for Iray usage. Link still works. https://www.daz3d.com/forums/discussion/comment/915815/#Comment_915815

There's also a post on the Allegorithmic forums by Szark regarding maps for studio. https://forum.allegorithmic.com/index.php?topic=13211.0#msg57736

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