@retrofam I wonder if Auto-Rotate is overriding that. You might need to disable it.

@RetroPieVin Yeah, I've had no obvious problem with rotating the video prior to starting ES, but I'm running very "low resource" games in this instance.

Like I said depending on which emulator you use it could do either. You could use a split screen mode like MAME2010 provides when you put anything in cocktail video mode or you could use a dip switch for rotating the entire play area for second player like MAME2003 does. You could also use a shader in RA to achieve a split screen affect for simultaneous two player action. (The shader option wouldn't just be for the second player though.)

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

@dankcushions Thanks, I'll look in that way. I wasn't aware of the use of shaders so far :-)

This shader has recently been rewritten by the amazing hunterk at libretro to create this effect at a very low processing cost in mame2003. You might have to tweak the parameters a bit in the retroarch menu or the code. It works great, and scales to fit the screen just like cocktail mode in mame2010.

https://github.com/libretro/glsl-shaders/blob/master/misc/cocktail-cab-portrait.glsl

Hello everyone! Can you show how your mirroring images looks like on you cocktail table? Can you use it with MAME games at all?