three.js/src/renderers/shaders/ShaderLib/meshstandard_frag.glsl

#define STANDARD

uniform vec3 diffuse;
uniform vec3 emissive;
uniform float roughness;
uniform float metalness;
uniform float opacity;

uniform float envMapIntensity; // temporary

varying vec3 vViewPosition;

#ifndef FLAT_SHADED

	varying vec3 vNormal;

#endif

#include <common>
#include <color_pars_fragment>
#include <uv_pars_fragment>
#include <uv2_pars_fragment>
#include <map_pars_fragment>
#include <alphamap_pars_fragment>
#include <aomap_pars_fragment>
#include <lightmap_pars_fragment>
#include <emissivemap_pars_fragment>
#include <envmap_pars_fragment>
#include <fog_pars_fragment>
#include <bsdfs>
#include <ambient_pars>
#include <cube_uv_reflection_fragment>
#include <lights_pars>
#include <lights_standard_pars_fragment>
#include <shadowmap_pars_fragment>
#include <bumpmap_pars_fragment>
#include <normalmap_pars_fragment>
#include <roughnessmap_pars_fragment>
#include <metalnessmap_pars_fragment>
#include <logdepthbuf_pars_fragment>

void main() {

	vec4 diffuseColor = vec4( diffuse, opacity );
	ReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );
	vec3 totalEmissiveLight = emissive;

	#include <logdepthbuf_fragment>
	#include <map_fragment>
	#include <color_fragment>
	#include <alphamap_fragment>
	#include <alphatest_fragment>
	#include <specularmap_fragment>
	#include <roughnessmap_fragment>
	#include <metalnessmap_fragment>
	#include <normal_fragment>
	#include <emissivemap_fragment>

	// accumulation
	#include <lights_standard_fragment>
	#include <lights_template>

	// modulation
	#include <aomap_fragment>

	vec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveLight;

	gl_FragColor = linearToOutputTexel( vec4( outgoingLight, diffuseColor.a ) );

	#include <fog_fragment>

}