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    Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first

    Flip image horizontally in some games

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    mame2003mame 2003flipping screenlightgunretroarch
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    • S
      svera
      last edited by svera

      Re: LR-MAME2003 - flipping the screen in SOME games

      As you may know, some lightgun games appear horizontally flipped in MAME 2003 as they originally used a mirror to display the image. I've been looking for a solution to this, and finally I found a shader which fix it perfectly: https://github.com/libretro/glsl-shaders/blob/master/misc/flip-horizontal.glsl
      Unfortunately, it's not included in Retropie, so you must download it and put it in /opt/retropie/configs/all/retroarch/shaders. Once there, run the game and, in Retroarch menu, go to Shaders, select it, 'Apply Changes' and then 'Save game preset'.

      dankcushionsD 1 Reply Last reply Reply Quote 1
      • dankcushionsD
        dankcushions Global Moderator @svera
        last edited by dankcushions

        @svera i think mame2003plus has corrected a lot of these flipped games.

        1 Reply Last reply Reply Quote 0
        • S
          svera
          last edited by

          @dankcushions I did try with MAME2003plus and Operation thunderbolt and the issue persisted, don't know if other games are fixed.

          1 Reply Last reply Reply Quote 0
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