karen Posted June 10, 2023 Share Posted June 10, 2023 IN attached hip file, I get some primitives generated, some are pointing up while others have their normals inverted, although there is no explicit normal yet. I've tried to reverse the normal of those pointing down but it doesn't work, any idea how to reverse the normals only if their pointing downwards? normal_up.hiplc Quote Link to comment Share on other sites More sharing options...
Ziyad Posted June 10, 2023 Share Posted June 10, 2023 (edited) Hi, you can use the normal node to to compute the normals more accuratly, then in the wrangle you can group the primitives with wrong normals similar to how you have it, and apply a reverse node to only those primitives. Hope this helps normal_up.hiplc Edited June 10, 2023 by Ziyad Quote Link to comment Share on other sites More sharing options...
Fenolis Posted June 27, 2023 Share Posted June 27, 2023 Just use Group: Group (Primitives) by Normal, set to 0, -1, 0 with angle of <10 or so Append a Reverse SOP and reference the group's name. Quote Link to comment Share on other sites More sharing options...
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