Babylon.js/src/Shaders/sprites.fragment.fx

uniform bool alphaTest;

varying vec4 vColor;

// Samplers
varying vec2 vUV;
uniform sampler2D diffuseSampler;

// Fog
#include<fogFragmentDeclaration>

void main(void) {
	vec4 color = texture2D(diffuseSampler, vUV);

	if (alphaTest) 
	{
		if (color.a < 0.95)
			discard;
	}

	color *= vColor;

#include<fogFragment>

	gl_FragColor = color;
}