Smooth material

I have mesh loaded from stl file, on the scene it looks like flat shaded mesh.
I need to make it smoother, use lights, but not modifying vertex data.
How can I achieve this effect only in visualization? Maybe using special material/shader/texture?
Any suggestions would be very appreciated!

can you share a picture of how the mesh looks like?

For example, this model
One of the solutions is mesh.forceSharedVertices(), but I don’t need to modify vertices data.

The lightning comes from the normals and unfortunately unless you are ok to update them I’m afraid there is not a lot we can do :frowning:

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