Issue to read normal map from hlsl sampler.

Development Rendering
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Hi, everyone.

I’ve been facing an issue recently. I’m trying to sample a normal map from a Texture2DArray using a custom HLSL node, but I can’t figure out why the normal map appears incorrect when sampled from my HLSL node, even though it works fine when sampled directly from Unreal.

Any ideas or suggestions? Thanks in advance for your help!

Screenshot 2025-01-04 201259
Screenshot 2025-01-04 2012591894×743 128 KB

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After research, you have to unpack the normal as follows :
https://forums.unrealengine.com/t/prevent-artifacts-in-packed-normal-maps/407501