We need this wheel to be invented already. Similar to how you generate normal-textures, which is just a texture of a vector that happens to be pointing a specific direction, we want to find a tool where you can draw a 2D or 3D vector onto a texture.

The most obvious use-case would be animating currents. You draw the current, use alpha as the currents strength and then you modulate it with math once in the shader kernel.

Any such tool?