Currently MC-TextureGen's nether portal texture generation is entirely deterministic, as it does not seem to account for the RNG-based "random shimmer" effect which nether portals supposedly had (#19). Since this is RNG-based, it likely also affected Pocket Edition's nether portals, but I can't be sure. More research is needed into this matter.
Since #19 was closed I don't remember how this should be any different unless bedrock edition's nether portal generation code truly did differ at some point
Currently MC-TextureGen's nether portal texture generation is entirely deterministic, as it does not seem to account for the RNG-based "random shimmer" effect which nether portals supposedly had (#19). Since this is RNG-based, it likely also affected Pocket Edition's nether portals, but I can't be sure. More research is needed into this matter.