layout(webgpu, set=1, texture=2, sampler=3) sampler2D tex;

void main()
{
    half4 a = sample(tex, half2(1));
    half4 b = sample(tex, half3(1));
    half4 c = sample(tex, half3(1), -0.75);
    sk_FragColor = a * b * c;
}