How do I disable all post process effects and get pixel perfect clarity?

Hello,

So whenever I load up my game in the editor it decreases the brightness and adds an overall muddy feel to it (See images below). I believe I have disabled all post-process effects with a global volume by taking advice from this thread here - How do I disable all post processes entirely? - Rendering - Epic Developer Community Forums

But for some reason this is still happening. Does anyone know what is causing this and how I can disable it and get perfect clarity as if no effects were applied? This is really starting to annoy me.

Note: I am modifying the colours of the original sprite (because this is a night time scene) using the adjustments section of the texture editor. The properties I am adjusting are: Brightness curve, Saturation, RGB Curve, and Hue. The material I am using for the sprites is just the default MaskedUnlitSpriteMaterial