sf

struct VS_OUT
{
    float4 PosH : SV_POSITION;
    float2 Tex  : TEXCOORD;
};

SamplerState Sampler : register(s0);

Texture2D DiffuseMap;

void main(VS_OUT pin)
{
    float4 Diffuse = DiffuseMap.Sample(Sampler, pin.Tex);

    //clip pixels having alpha value < 0.15 (nearly transparent)
    clip(Diffuse.a - 0.15f);

}