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can anyone tell me why in the world these tube shapes are appearing this way? It's as if they're reflecting in different directions.. they almost appear black in some cases. It's a simple shader setup, only using principled BSDF, no tricks..enter image description here

Effninwall
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    hello, hard to say, maybe share your file: https://pasteall.org/blend/ – moonboots Oct 26 '21 at 13:13
  • it could be shadows – Ribbit12 Oct 26 '21 at 13:16
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    That looks more like flipped normals, or bad shading – MikoCG Oct 26 '21 at 13:17
  • Turns out this was an issue with Normals, solved by 'splitting' the normals, i.e. in edit mode: Mesh -> Normals -> Split. I'm not entirely sure what this does but it certainly solved the problem. Note: the object in the image is part of an imported OBJ file, it seems this isn't an uncommon issue with normals and OBJ imports. Hope this helps someone else in the future, and thanks for the input all. – Effninwall Oct 27 '21 at 14:30

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