A method of generating a virtual image, comprising: directing a light beam to a first side of an eyepiece , including transmitting the light beam into a first waveguide of the eyepiece ; deflecting, by one or more first diffractive elements of the first waveguide , a first portion of the light beam towards a second waveguide of the eyepiece , the first portion of the light beam associated with a first phase of light; deflecting, by a plurality of protrusions positioned on the first side of the eyepiece , a second portion of the light beam towards the second waveguide of the eyepiece , the second portion of the light beam associated with a second phase of light differing from the first phase; and deflecting, by one or more second diffractive elements of the second waveguide , some of the first and the second portions of the light beam to provide an exiting light beam associated with the virtual image, the exiting light beam based on the first and the second phases, wherein the plurality of protrusions for minimizing the striation of the virtual image comprises: a first subset of two or more protrusions having a first geometric structure, a first refractive index, a first shape and a first height; and a second subset of two or more protrusions having a second geometric structure different from the first geometric structure, a second refractive index different from the first refractive index, a second shape different from the first shape and a second height different from the first height. directing a light beam to a first side of an eyepiece , including transmitting the light beam into a first waveguide of the eyepiece ; deflecting, by one or more first diffractive elements of the first waveguide , a first portion of the light beam towards a second waveguide of the eyepiece , the first portion of the light beam associated with a first phase of light; deflecting, by a plurality of protrusions positioned on the first side of the eyepiece , a second portion of the light beam towards the second waveguide of the eyepiece , the second portion of the light beam associated with a second phase of light differing from the first phase; and deflecting, by one or more second diffractive elements of the second waveguide , some of the first and the second portions of the light beam to provide an exiting light beam associated with the virtual image, the exiting light beam based on the first and the second phases, wherein the plurality of protrusions for minimizing the striation of the virtual image comprises: a first subset of two or more protrusions having a first geometric structure, a first refractive index, a first shape and a first height; and a second subset of two or more protrusions having a second geometric structure different from the first geometric structure, a second refractive index different from the first refractive index, a second shape different from the first shape and a second height different from the first height. a first subset of two or more protrusions having a first geometric structure, a first refractive index, a first shape and a first height; and a second subset of two or more protrusions having a second geometric structure different from the first geometric structure, a second refractive index different from the first refractive index, a second shape different from the first shape and a second height different from the first height. <EOS>