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    tangent space vector displacement

    I'm trying to figure out how to use a tangent space vector displacement map in my material, but I'm running into some issues in the math. The Unreal material only accepts world displacement, so I figured that I needed to convert tangent to world space. I ended up getting pretty close but there is still some unwanted scaling/skewing on the proportions of the shape as the object rotates.

    Here is the resulting material assigned to a rotating cube.
    https://streamable.com/fpf79

    And here are the expressions as seen in the Material Editor.
    https://i.imgur.com/kpsWvKI.jpg

    What's the proper workflow to use tangent space vector displacement maps?

    #2
    Having similar issues. Have a tangent-space vdm displacing in WS only

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