The 189 update specifically nails the lighting equation. It introduces a pseudo-HDR effect that makes caves look dark without using actual dynamic lights (which kill FPS). The "Extra Quality" setting adds just enough polish to the water and sky that you will forget you are playing on a potato.
: Open the "Shader Options" button in the bottom right of the selection screen. Look for a Profile or Quality slider and move it to High or Ultra if your PC can handle it. potato shaders 189 extra quality
: Get the latest version from the Official Potato Shaders page . The 189 update specifically nails the lighting equation