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How to use Normal Maps to fake displacement in Houdini


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I will look at the PolyFrame SOP, but I will try to find a solution for 9.1, because I haven't upgraded my HD license yet.

Thanks.

Using PolyFrameSOP in my test gave me correct but blurry effect. Well, as I understand it, in that case, tangents are interpolated between vertices and this is a reason for that.

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Yes, I noticed this blurriness. I took these vectors into a shader, converted them to a matrix, multiplied by the tangent normal and transform to camera space. Works good.

Oh, and I had to negate the Z component of the tangent-space normal, and then negate the resulting object space normal.

When I finish with it, I'll upload the HDA I created.

So maybe we can use the dpds/dpdt instead, to get sharper results?

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