vec3 lightAccum = u_sh[0];

            lightAccum += u_sh[1] * normal.x;
            lightAccum += u_sh[2] * normal.y;
            lightAccum += u_sh[3] * normal.z;

            lightAccum += u_sh[4] * (normal.x * normal.z);
            lightAccum += u_sh[5] * (normal.z * normal.y);
            lightAccum += u_sh[6] * (normal.y * normal.x);

            lightAccum += u_sh[7] * (3.0 * normal.z * normal.z - 1.0);
            lightAccum += u_sh[8] * (normal.x * normal.x - normal.y * normal.y);