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Attaching objects into one changes their material appearance

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  • Attaching objects into one changes their material appearance

    I came upon a strange thing while attaching my objects into one. A particular object's material changed appearance. I've checked the materials IDs after attaching and they are all fine. If I detach it to separate objects again, the material changes back to the original look. Please see screenshot below.


    Click image for larger version  Name:	objects_attached_vs_detached.jpg Views:	0 Size:	109.5 KB ID:	1116476
    Last edited by Alex_M; 11-06-2021, 07:38 AM.
    Max 2023.2.2 + Vray 6 Update 2.1 ( 6.20.06 )
    AMD Ryzen 7950X 16-core | 64GB DDR5 RAM 6400 Mbps | MSI GeForce RTX 3090 Suprim X 24GB (rendering) | GeForce GTX 1080 Ti FE 11GB (display) | GPU Driver 546.01 | NVMe SSD Samsung 980 Pro 1TB | Win 10 Pro x64 22H2

  • #2
    Not sure. Could you strip down the scene and attach it here or send it via the contact form? Address it to me in the subject and include a link to this thread in the message.
    Aleksandar Hadzhiev | chaos.com
    Chaos Support Representative | contact us

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    • #3
      Sure, see attached.
      Attached Files
      Max 2023.2.2 + Vray 6 Update 2.1 ( 6.20.06 )
      AMD Ryzen 7950X 16-core | 64GB DDR5 RAM 6400 Mbps | MSI GeForce RTX 3090 Suprim X 24GB (rendering) | GeForce GTX 1080 Ti FE 11GB (display) | GPU Driver 546.01 | NVMe SSD Samsung 980 Pro 1TB | Win 10 Pro x64 22H2

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      • #4
        I saw something similar recently. Didn’t have time to diagnose it, but it almost looked like the attach had messed up the smoothing.

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        • #5
          Thank you for the provided scene. The issue is caused by two things - the Rounded corners on the big cylinder and the refractiveness of the small cylinder. I am not yet sure if this is a bug or a byproduct of the rounded corners' effect. I'll write again with more information.

          EDIT: Setting the Rounded corners mode to Convex only resolves the issue, so you may use it as a workaround.
          Last edited by hermit.crab; 18-06-2021, 09:23 AM.
          Aleksandar Hadzhiev | chaos.com
          Chaos Support Representative | contact us

          Comment

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