How can I do these bright lines?
Go play Rockband?
In all seriousness, use the default additive particle shader with a gradient bitmap.
Is that it? No bloom/blur/specular magic or anything?
I tried using the Additive shader but it’s far from good. Maybe I’m missing something?
I’ve attached a package that might give you a bit of a starting point. The main thing with the particles/additive shader is that it is quite sensitive to the colours you use. To get a glowing yellow line, try using quite a dark yellow particle texture, blurred with a slightly lighter centre. You can reduce the size of the ellipsoid emitter so that the particles essentially come out in a line. You will probably need to experiment with the settings of the particle system to get the exact effect you want, but it should basically be a sound approach.
410651–14211–$YellowLineParticle.zip (61.8 KB)
Many thanks andeeee.Im going to try something with this package. The concept of using a dark color will surely help me.
Along with andeeee’s approach, the following thread might help someone looking for a similar effect.
http://forum.unity3d.com/threads/23036-glow-on-trail-renderer