> > See my above description. There is no min / mid / max option, if you just use *one* > > single shader at default settings inside the shader-chain. Any more complex shader, > > just consists of those single shaders, but in a chain and even then, you have only > > the options i described above. > > Thank you. At least you to get it. > > Sliders and other variables like that are irrelevant, they're ultimately just shader > uniforms. If the output of a BGFX-ported shader matches with the output of the > libretro shader with default settings, then the same slider settings should also > match. It's not something I need to concern myself with.
Unless you misapply the variables (eg make a typo and use the same one twice) which seems to be quite a common mistake, not just in shaders, but in code in general, such things have been the source of plenty of MAME bugs over the years.
I think the person asking the question was just being vigilant, and had a valid question to ask, which your initial post definitely didn't answer.