Squishy scroll
Simple shader that makes your TextureRect moving with squish effect inside.
You have to select Tile in Stretch Mode:
Shader code
shader_type canvas_item;
uniform float scroll_speed = 0.08;
//uniform vec2 texture_scroll = vec2(1.0, 0.0);
void fragment()
{
vec2 uv = UV;
uv.x = UV.x * 1.0 + pow(abs(sin(3.14 * UV.x/2.0)),2.0);
//COLOR = texture(TEXTURE, uv + texture_scroll);
COLOR = texture(TEXTURE, uv + (scroll_speed * TIME));
}