Concentrated Lines

https://gyazo.com/0273ea0629164e3127778acadd3db61f

See.

code:HLSL

fixed4 frag (v2f i) : SV_Target

{

float2 uv = 2 * i.uv - 1;

float r = length(uv);

r = 0.7 * r - 0.7;

float a = atan2(uv.y, uv.x);

a = abs(cos(50 * a) + sin(20 * a));

float d = a - r;

float n = smoothstep(0.1, 0.4, saturate(d));

fixed4 col = tex2D(_MainTex, i.uv);

return n * col;

}