Artifacts are visible on meshes when Triplanar normal sampling is used

6.0.X

As Designed

I took a look at the sample project. In addition to the particular UV setup, the tangent vectors of the mesh are broken: they always point along the x-axis (1,0,0), regardless of the vertex normal. These tangent vectors are used to form the tangent frame, which is also broken if the normal and the tangent vectors are collinear. If you take a look at the shader graph, you will notice that the fragment shader only accepts the normal in the tangent space. That is an old (and rather unfortunate) decision that has not been made by me. As a result, normal mapping cannot be done correctly if the tangent frame is broken. Of course, triplanar mapping by itself has nothing to do with the tangent frame. However, given the current design of the shader graph (and its limitations), we require a valid tangent frame. It would be nice if triplanar normal mapping worked without the tangent frame. However, our bug report system is not the right place to make feature requests. Finally, I encourage you to check out the surface gradient bump mapping package: https://docs.unity3d.com/Packages/com.unity.surface-gradient-bump-mapping@0.2/manual/index.html It may resolve some of your issues.