How to draw a line with flowing light texture?

like this

it is EmissiveTexture ?

You can use the glow layer for this:

https://playground.babylonjs.com/#LRFB2D#1

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In addition to dynamic glow (you can control different parameters of the glow) you may also animate emissive texture in render loop to create movement effect, like in this example https://www.babylonjs-playground.com/#B6M2DD#3

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