Question Generate random vertical lines in 2D Shader

Hi,

I've made some shaders for my 2D game already, but I'd say I'm still very new to this topic.
Broader context:
I want to add grass "pattern" on specific color of the Sprite. I know how to do some modifications on specific color like add noise or modify color etc.

Exact problem:
How to generate random vertex lines (preferably wavy, but that's the next step).

I was thinking about using Noise but I have no idea how to "stretch" it vertically.
Ilustration of what I want to achieve:


And maybe a different idea: connecting points vertically from Gradient:


But I have no idea how to achieve any of these ideas.
Are there Shader Nodes which I can use to do that?

 

To stretch vertically, create a UV node, plug that UV node into a Tiling and Offset node, and plug that Tiling and Offset node into the Noise's UV slot. Then on the Tiling and Offset, adjust the Tiling's y-value so it's (1x, 3+y) - stretched!

 

Thank you, it is quite what I wanted! Two things:

1. I need to increase the X value to stretch vertically or maybe I'm doing something wrong.


2. When I use this UV, in game, when I move the camera left/right, the vertical lines change position (or disappear and reappear). Is this related to some aliasing issue or maybe the resolution of noise generation? The larger the value of X (the higher and thinner the lines), the greater the problem. I marked a few places to make it easier to see the differences. This is with Tiling X50 Y1 and Gradient Noise scale 300


Can i do something about it or the only solution is to use smaller Tiling?

 

Yeah, that could be the source of the problem.

I suggest switching from noise to sampling a texture that has the exact pattern you want with a width that appropriate and doesn't produce artifacts like that. There's no need to use Tiling and Offset to stretch in this case. This will also be more performant.