Actually, it's not a shader.
A member registered Apr 05, 2017 · View creator page →
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The game runs in low resolution and there aren't many effects, so while we don't know exact specs, the requirements should be low. It was developed on a laptop with an integrated video card after all.
Fariwalk: the past comments · Replied to Lumps Plays - Visual Let's Plays in Fariwalk: the past comments