                    'void main() {',
                        /* glsl */ `
                        uniform sampler2D reflectMap;
                        uniform float mirror;
                        uniform float mixStrength;

                        in vec4 vCoord;
                        in vec3 vToEye;

                        void main() {
                        `
                    );

                    shader.fragmentShader = shader.fragmentShader.replace(
                        '#include <emissiv