ARC Shaders
by SixthSurge
A lightweight Iris shader from the creator of Photon. ARC delivers colored block lighting and clean shadows with minimal performance cost.
About ARC Shaders
ARC Shaders is a performance Minecraft shader pack by SixthSurge, aimed at a clear visual lift that still runs fast. It rebuilds the game's lighting engine to deliver efficient shadows and lighting tuned to spare frames, transforming flat vanilla blocks into a world with real light and shadow. It carries a light performance cost and supports Minecraft 1.19 - 1.21.
The look is defined by coloured light from torches, lava, and glowstone, soft, gently feathered shadows, bloom that makes bright sources glow, and reworked water with depth, ripples, and clarity. Together these effects reshape every scene, from the way morning light rakes across terrain to how water and glass catch reflections at dusk.
ARC Shaders suits players on modest or older hardware who still want shaders. Players highlight its great colored lighting and very lightweight as standout qualities. It runs through Iris on Minecraft Java, and its low-tier demands mean it pairs best with the hardware described in the requirements below.
ARC Shaders effects, shown
ARC Shaders ships 6 headline effects. Each preview below is a hand-drawn illustration of what that effect does to a Minecraft scene, not a screenshot of the pack itself - the screenshot at the top of the page is the real thing.
Colored lighting
Torches burn orange, lava burns red, sea lanterns burn blue, and the room takes on that colour.
Soft shadows
Shadow edges soften with distance from the block that casts them, the way real sunlight behaves.
Bloom
Bright sources bleed light into the pixels around them, so glowstone and lava actually glow.
Enhanced water
Water gets depth, moving ripples and clarity instead of a flat blue plane.
Waving vegetation
Every plant in the world picks up the same breeze, so fields move as one.
Custom sky
A redrawn sky with its own day-to-night gradient, sun, moon and star field.
How ARC Shaders changes Minecraft
Unlike a texture pack, ARC Shaders does not repaint blocks - it replaces how Minecraft lights and renders the scene. Here is what it adds to your game:
- Colored lighting: it adds coloured light from torches, lava, and glowstone.
- Soft shadows: it adds soft, gently feathered shadows.
- Bloom: it adds bloom that makes bright sources glow.
- Enhanced water: it adds reworked water with depth, ripples, and clarity.
- Waving vegetation: it adds vegetation that sways naturally in the breeze.
- Custom sky: it adds a redrawn sky with a richer day-night cycle.
- Overall direction: the result is a clear visual lift that still runs fast, applied consistently across the whole world.
Loaders ARC Shaders runs on
ARC Shaders system requirements
What ARC Shaders does well
- Great colored lighting
- Very lightweight
- Same developer as Photon
- Clean and modern
Cons
- Iris only
- Limited advanced effects
- Less configurable than larger packs
How to install ARC Shaders
- 1Install Fabric (or Quilt) for your Minecraft version, then add the Iris Shaders mod - ARC Shaders is an Iris-targeted shader and needs it to run.
- 2Download the ARC Shaders .zip from the official source linked above. Keep it zipped.
- 3Launch Minecraft with the Iris/Fabric profile, open Options, then Video Settings, then Shader Packs.
- 4Click "Open Shader Pack Folder" and drop the ARC Shaders .zip into the folder that opens.
- 5Select ARC Shaders from the list and click Apply. The shader compiles and loads after a short pause.
ARC Shaders performance notes
ARC Shaders sits in the low-impact tier, meaning a light performance cost over vanilla Minecraft. Most systems, including laptops and integrated graphics, hold a smooth frame rate.
As a baseline it lists GTX 750 / RX 550 with 1 GB of VRAM and 2 GB of system RAM. That keeps the bar low, so even older dedicated cards and many integrated chips can run it once OptiFine or Iris is installed.
ARC Shaders officially supports Minecraft 1.19 - 1.21. Running it on a version outside that range may cause visual glitches until the author updates it, so match your client to a supported release.
Because the cost is modest, you can usually raise render distance or pair ARC Shaders with an HD texture pack without dropping below a smooth frame rate.
Questions about ARC Shaders
What do I need to run ARC Shaders?
ARC Shaders is an Iris shader, so you need Fabric (or Quilt) plus the Iris Shaders mod. On the hardware side it lists GTX 750 / RX 550 with 1 GB of VRAM as a baseline.
Is ARC Shaders good for low-end PCs?
Yes. ARC Shaders is a low-impact shader, so most systems, including laptops and integrated graphics, hold a smooth frame rate. It is one of the friendlier options for weaker hardware.
Which Minecraft versions does ARC Shaders support?
ARC Shaders officially supports Minecraft 1.19 - 1.21. For the smoothest experience, run a Minecraft client within that range alongside a matching version of Iris.
What are the downsides of ARC Shaders?
The trade-offs worth knowing before you install are iris only and limited advanced effects. For most users the visual payoff outweighs these, but they are the points players raise most often.
How do I install ARC Shaders?
Add Fabric and the Iris mod, then drop the ARC Shaders .zip into your shaderpacks folder and select it under Video Settings, Shader Packs. Full steps are above.
What is ARC Shaders best for?
ARC Shaders is a performance shader that delivers efficient shadows and lighting tuned to spare frames. It is ideal for players on modest or older hardware who still want shaders, and like other Minecraft shaders it is free to download from the official source linked above.
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Ready to install ARC Shaders?
Follow our step-by-step guide to get shaders running on your Minecraft client.
Installation Guide