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    Redshift Glass Shows up as black

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    • MaverickMongoose
      MaverickMongoose last edited by

      Hi Dr Sassi, I have 4 glass objects in my scene, 2 render fine, but the other 2 objects which are very thin just render black.

      Is there a way to render super thin glass objects?

      In Octane I think I needed to adjust the ray epsilon to fix similar problems, not sure what to do in Redshift though.

      Or could it just be dodgy geometry? It seems clean to me.

      Or maybe something in the material? The same material works on the other objects.

      Thanks again

      https://we.tl/t-bsiqOLxhcc

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      • Dr. Sassi
        Dr. Sassi last edited by Dr. Sassi

        Hi MaverickMongoose,

        Thank you for the files.

        The black glass shows up based on wrong Normals, which is an easy fix.
        Select the object and use the Polygon mode for this. With the "mouse" in the editor view, select all (cmd + a)
        Then go to Main Menu> Mesh> Normals> Reverse Normals—one time.

        Repeat this for the other object.

        (This works here as all Normals are "wrong" in the same way; otherwise, use the Align Normals first. This function uses the first polygon as orientation; if that isn't working directly, use the process from above afterward.)

        Here is the result when I do it this way.

        Screen Shot 2024-02-18 at 11.10.10 PM.jpg

        All the best

        Dr. Sassi Sassmannshausen Ph.D.
        Senior Trainer, Maxon Master Trainer, L&D - Strategist
        Cinema 4D mentor since 2004, Member of VES, DCS.

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        • MaverickMongoose
          MaverickMongoose last edited by

          doh,I swear I tried that and it didn't work, maybe I had the wrong thing selected.

          Works great now, thanks again!

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          • Dr. Sassi
            Dr. Sassi last edited by

            Great that is works for you, MaverickMongoose.

            My best wishes

            Dr. Sassi Sassmannshausen Ph.D.
            Senior Trainer, Maxon Master Trainer, L&D - Strategist
            Cinema 4D mentor since 2004, Member of VES, DCS.

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