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I want to use gn to achieve the effect like Susan's below. How can I use gn to create an attribute that interferes with the normal direction and pass it into the shader? thank you very much enter image description here

capozio
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  • Just Store Named Attribute of Vector type, and use the Attribute node in the shader to read it. Here's a real life example where I do it: Rounded cap on Curve with Geo Nodes – Markus von Broady Sep 23 '23 at 17:29
  • Thanks for your answer, but I still don't quite understand. The Susan on the right in the picture is the result of a normal map I drew. The effect on the left is what I want to use GN to achieve. How should I make a normal map like the one on the right in GN? – capozio Sep 24 '23 at 02:54
  • If you know how to calculate the texture but you don't know how to send it to the shading - then that's what I answered. That's how I understand the title of your question. If you have a specific pattern in mind that you want to reproduce, then the question should be "How do I achieve this pattern?" (which would be a bad question because of the usage of "this", so ideally we could find a name describing this pattern) - and I'm not sure how to achieve this particular pattern, I would try saving on each face coordinates of its corners and use that in the shader… – Markus von Broady Sep 24 '23 at 09:27
  • Yes, I actually have two problems. You have solved the first one for me. After I downloaded your blender file, the first problem has been solved perfectly. thank you very much! The second question is how to use GN to make a normal map so that it looks like an oil painting (the second monkey head is an oil painting monkey head I made using a non-GN method) – capozio Sep 24 '23 at 11:55
  • link the second monkey effect is here – capozio Sep 24 '23 at 12:03

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