Vertex Normal ws outputs vector data stored at each vertex. We mostly use it to procedurally put a second material on top of objects.
What is the Vertex Normal WS Node? The VertexNormalWS expression is a powerful tool that outputs the world-space vertex normal. But what does that mean? Essentially, it provides information about the direction each vertex (or point) on a 3D mesh is facing in the global coordinate system.
Why Does It Matter? Whether you’re working on game environments, architectural visualizations, or product renders, mastering the VertexNormalWS node unlocks a world of creative possibilities.
How Can We Use It? I’ll walk you through practical examples of how to leverage the VertexNormalWS node.
Watch the video to see the VertexNormalWS node in action!
https://dev.epicgames.com/community/learning/tutorials/4Jmr/vertex-normal-ws-node-explained-unreal-engine-materials