A non-transparent microvoided biaxially stretched self-supporting non-laminated polymeric film, the film comprising linear polyester as a continuous phase and dispersed uniformly therein an amorphous high polymer comprising at least one chain-polymerized block with a higher glass transition temperature than the glass transition temperature of the continuous phase and isotactic poly(4-methyl-1-pentene), wherein the linear polyester consists essentially of aromatic dicarboxylate and aliphatic dimethylene monomer units, wherein the combined concentration of the uniformly dispersed amorphous high polymer and isotactic poly(4-methyl-1-pentene) in the film is 5 to 35% by weight; the use of the above-described non-transparent microvoided biaxially stretched film in synthetic paper; an image recording element comprising the above-described non-transparent microvoided biaxially stretched film; and a process for producing a transparent pattern comprising the step of: image-wise application of heat optionally supplemented by the application of pressure to the above-described non-transparent microvoided biaxially stretched film.