[Solved] Dissidia 12 graphics issue

[GuilhermeGS2]

non-Buffer Rendering skips buffer effects (that's why sometimes you'll get black screen), but render graphics to the resolution of Screen Resolution (it's below Rendering Resolution), by defaut it's 2xPSP. If you're using the native resolution of your device on this, and if your device has FHD resolution for example, it'll be too heavy for the GPU.

You said you tried Auto (1:1) and 1xPSP, but did you try 2xPSP? I don't know your screen size, but my phone is 5.5 inches, and 2xPSP resolution (960x544) is good enough to this size.

And a tip to you improve your performance, instead of using frameskiping, which gives a bad gameplay experience, I recommend you to reduce internal CPU clock in System settings of the emulator, it probably will reduce the FPS a little (if you're playing with 15 FPS frameskiped, I guess you won't mind), but the emulation speed will increase.