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Fixed in 2019.2

Fixed in 2018.4, 2019.1



Found in




Issue ID




Raycasts hit the second layer of the Mesh Collider when the first layer is thin



How to reproduce:
1. Open the "SampleScene" Scene in the attached "" Project
2. Select "TestMesh" and click on the helmet Collar on the side where the helmet screen is
3. Move the Camera to see where the Raycast hit

Expected Behavior: The Raycast hits helmet screen
Actual Behavior: The Raycast hits helmet collar which is behind one thin helmet screen

Reproducible with: 2018.3.0a5, 2018.3.9f1, 2019.1.0b7, 2019.2.0a8
Not reproducible with: 2018.3.0a4

Note: Could not check with 2017.4 because of C# Environment version 6.0 the MeshCollider.Raycast cannot take the "out" parameter.

  1. Response avatar

    Resolution Note (fix version 2019.2):

    Fixed in 2019.2.0a11 backported to 2018.4.3f1

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    Thanks for sharing about Raycasts hit the second layer of the mesh collider when the first layer is thin. I have read about the issue but don't have much idea about it. I think it something connected with computer graphics.

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