This is a 3D Particles Shader done in Godot 3.4.stable, to draw Tunnel Speed Lines.
Tunnel dimensions are set by Tunnel Radius and Tunnel Length.
Velocity is set by Lifetime ( = Preprocess ).
Draw Pass 1 draws Quad-stripes with editable size x=3.0, y=0.4.
Draw Pass 1 Material has a Shader Param Texture Albedo, to use your own texture with alpha channel.
