@topapate The core issue is that MAME "cheats" . For example they use a frame buffer instead of reproducing the line buffer from the original HW. Then the AI mimics MAME and not the real HW which creates a subpar solution
@akio_1963 Mr Akio, thank you for your description of the hardware. Is there any way we can modify our R-Type II PCBs so that we will experience the darker theme you intended to make ?