First, a clarifier: "451" is shorthand for version 4.5.1. This is a specific stable release of the shader pack created by the brilliant developer EminGT. Unlike its main competitor (BSL Shaders), Complementary Shaders was designed from the ground up with a single philosophy: Vanilla plus.
Version 4.5.1 builds upon this legacy. It is not a hyper-realistic, ray-traced monster that requires a $2,000 GPU. Instead, it uses clever color grading, deferred lighting, and volumetric effects to make Minecraft look like what you remembered it looked like as a child—vibrant, atmospheric, but unmistakably blocky.
While earlier versions (4.0, 4.2) were good, v4.5.1 introduced three critical fixes that pushed it to "best" status:
Title: Complementary Shaders 4.5.1 – Why It’s the #1 Choice for Minecraft
If you’re looking for the best shaders for Minecraft, Complementary Shaders v4.5.1 (often shortened to “451” by the community) is widely considered the gold standard. It perfectly balances stunning visuals with smooth performance.
Why v4.5.1 stands out:
Best settings for v4.5.1 (The “451” preset): complementary shaders 451 best
👉 Pro tip: Pair with a resource pack like Faithful or Vanilla Normals Renewed for the best look.
Download: Modrinth or the official Complementary Shaders page.
To achieve the "451 best" experience:
You don't need a $2,000 graphics card to run 451. It runs on a Steam Deck. It runs on a MacBook. It runs on that dusty GTX 1060 you refuse to retire. Because 451 isn't about spectacle. It's about presence.
Other shaders scream, "Look how real I am!" Complementary 451 whispers, "Look how right I feel."
It is the best not because it pushes the limits of rendering, but because it understands the limits of the human eye. It knows that a sunset over a Plains village doesn't need ray-traced caustics. It just needs the color orange to be honest. First, a clarifier: "451" is shorthand for version 4
So go ahead. Install Iris or OptiFine. Drop in Complementary Shaders v4.5.1 (the community still calls it 451). Stand on a hill at dusk.
You won't see a shader. You'll see home.
Rating: 451/451.
To get the best experience with Complementary Shaders (specifically version v4.5.1 and newer iterations like Reimagined or Unbound), focus on balancing high-fidelity lighting with optimized performance. Core Visual Choices
Reimagined vs. Unbound: Reimagined preserves the blocky, vanilla feel while adding modern lighting, whereas Unbound aims for a more realistic, cinematic look.
Profile Selection: Start with the High profile for most modern GPUs. For lower-end systems, use the Potato or Medium profiles to maintain high FPS. Recommended Performance Settings Best settings for v4
Real-time Shadows: Set to Medium or Low on older hardware; Very High is only recommended for high-end cards.
Light Shaft Quality: Turn this off or to Low to save resources without a major visual hit.
Advanced Color Lighting: Keep this around 12 chunks for consistent global illumination.
Texture Filtering: Use 8x for sharper blocks; turn it off on integrated graphics. Essential Visual Tweaks
Glowing Ores: Enable Integrated PBR in the materials menu to make ores like Diamonds and Redstone emit light.
Vanilla Look: If you prefer the classic look, disable Foliage Shadows and Specular Reflections to reduce overbearing contrast.
Water Quality: Set Water Detail to High for realistic auroras and lighting, but keep Reflection Quality at Medium to avoid significant lag. Installation Tip
Install the shaders by dragging the .zip file directly into your Minecraft shaderpacks folder. Most players prefer using the Iris Shaders mod or OptiFine for better optimization.
// Copper Shimmer: adjustable oxidation (0..1)
float oxidation;
float3 baseColor = float3(0.85,0.45,0.2);
float3 oxideColor = float3(0.2,0.9,0.75);
float fresnel = pow(1 - saturate(dot(normal, viewDir)), 2.0);
float mask = noise(uv*10) * smoothstep(0.2,0.8,oxidation);
float3 albedo = lerp(baseColor, oxideColor, mask * oxidation * fresnel);