This minecraft shader is inspired by horror games like silent hill and this mod has multiple features that accomplishes that feat of scaring you

Incremental Shaders improves various visual aspects of the game through small, progressive enhancements; delivering cleaner lighting, richer colors, and better overall clarity while preserving the original look and feel.

Enhanced Vision highlights the outlines of objects and walls, and it blurs objects, with the blur increasing with increasing distance of the object from the centre of the player's view. Additionally, it adds a shimmering effect over fire sources and lava.

Shaderpack that adds many interactive and realistic features such as foliage that reacts to you moving nearby, water reflections, godrays, and much more.

A light shader which adds basic shadows, anti aliasing, realistic clouds and semi-realistic water to Minecraft.

A shader adding a few neat visual addons like damage effects or blurring water depending on your swim speed