Bug on Highlight layer: Cannot create property '_needNormals' on string '#define NUM_BONE_INFLUENCERS 0 #define HIGHLIGHT'

[Evgeni_Popov]

Maybe it’s the same bug than the one fixed here:

Exception if material parameter set on LinesMesh

Thanks for the repro! This PR will fix the problem: Note that even with the fix you will see some flickering and/or different colors for the shading of the lines: that’s because the standard material is applying lighting. You probably want to use the emissive color for the line color and disable lighting, as in:

Try to test your project with an updated Babylon.js package when the PR is merged.