Surface/mesh orientation and curvature shader

[i.serov]

Why when displaying curvature evaluation mode on, surfaces and meshes are rendered with reverse curvature ?

The curvature shader shows convexity on the surface and concaveness on the mesh. Orientation (normals) of both surfaces and mesh are identical. I have attached a few screenshots to illustrate my question.

[david.lau]

We have been able to reproduce the problem in 2025, 2024.x, 2023.x, 2019.  We are trying to figure out why the behaviour happens (expected) or is it a bug.

You can fix the issue by selecting the reversed curvature via selecting Palette > Mesh > Reverse Mesh Orientation.

[KaiTi.L]

Hi @i.serov thanks for bringing this up.
I don't know why the curvature is displayed in the reverse direction on the mesh. It looks like an issue to me.
I created a ticket for our Developer for investigation ALS-28450.