Android Performance - Is it better to use a 2DTexture or generate one from code?

Hi everyone.
I'm doing VFX every single day and changing the width of a simple ring texture can be an unpleasant process going from photoshop to unity, or changing the grayscale values of a lens flare texture..
Anyway, I was wondering if I used shadergraph to generate those procedural patterns, would it be more efficient than having a sampletexture2d ?
An alternative would be a tool to generate useful textures for VFX directly inside unity...
Thanks everyone!