Photon Shader
by SixthSurge
A cutting-edge path-traced shader for Iris with advanced global illumination, volumetric effects, and PBR material support.
What Photon Shader looks like in-game
Photon Shader ships 8 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.
Path-traced GI
Indirect light is traced through the scene, filling shaded corners the sun never reaches directly.
Volumetric clouds
Clouds gain real thickness, catch the sun on one side and cast shade below.
PBR
With a PBR resource pack, blocks gain real roughness and metalness: polished stone shines, wool does not.
Screen-space reflections
Anything on screen is reflected back off water, ice and metal in real time.
Bloom
Bright sources bleed light into the pixels around them, so glowstone and lava actually glow.
Depth of field
What you look at stays sharp while the background falls out of focus, like a real lens.
Motion blur
Fast movement smears between frames, so sprinting and mine-cart rides read as speed.
Caustics
Sunlight bends through the surface and paints a moving net of light on the seabed.
Compatibility
What you need to run Photon Shader
Baseline card: RTX 3060 / RX 6700 XT. Meters are scaled against a 12 GB VRAM / 32 GB RAM reference build.
An overview of Photon Shader
Photon Shader is a high-end Minecraft shader pack by SixthSurge, aimed at maximum-fidelity, cutting-edge visuals. It rebuilds the game's lighting engine to deliver ray-traced or path-traced light that resolves accurate bounce lighting and reflections, transforming flat vanilla blocks into a world with real light and shadow. It carries an extreme performance cost and supports Minecraft 1.19 - 1.21.
The look is defined by path-traced global illumination that bounces light realistically around the scene, thick, volumetric clouds with real depth, PBR support so compatible texture packs gain real reflectivity and depth, and screen-space reflections that mirror the world on water and ice. Together these effects reshape every scene, from the way morning light rakes across terrain to how water and glass catch reflections at dusk.
Photon Shader suits enthusiasts with powerful graphics cards who want the very best image quality. Players highlight its high-quality path-traced lighting and iris native as standout qualities. It runs through Iris on Minecraft Java, and its ultra-tier demands mean it pairs best with the hardware described in the requirements below.
How Photon Shader changes Minecraft
Unlike a texture pack, Photon Shader does not repaint blocks - it replaces how Minecraft lights and renders the scene. Here is what it adds to your game:
- Path-traced GI: it adds path-traced global illumination that bounces light realistically around the scene.
- Volumetric clouds: it adds thick, volumetric clouds with real depth.
- PBR: it adds PBR support so compatible texture packs gain real reflectivity and depth.
- Screen-space reflections: it adds screen-space reflections that mirror the world on water and ice.
- Bloom: it adds bloom that makes bright sources glow.
- Depth of field: it adds depth of field that blurs the background for a cinematic look.
- Overall direction: the result is maximum-fidelity, cutting-edge visuals, applied consistently across the whole world.
Photon Shader at a glance
Pros
- High-quality path-traced lighting
- Iris native
- Active development
- Advanced volumetric effects
Where Photon Shader asks something back
- Very demanding
- Requires high-end hardware
- Can be unstable on some configs
How to install Photon Shader
- 1Install Fabric (or Quilt) for your Minecraft version, then add the Iris Shaders mod - Photon Shader is an Iris-targeted shader and needs it to run.
- 2Download the Photon Shader .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 Photon Shader .zip into the folder that opens.
- 5Select Photon Shader from the list and click Apply. The shader compiles and loads after a short pause.
Running Photon Shader smoothly
Photon Shader sits in the ultra-impact tier, meaning an extreme performance cost over vanilla Minecraft. It targets high-end GPUs and is demanding even on them; lower-end cards will struggle at default settings.
As a baseline it lists RTX 3060 / RX 6700 XT with 6 GB of VRAM and 8 GB of system RAM. Those are minimums for a playable experience - for a steady 60 FPS at a reasonable render distance, aim well above them, ideally a modern dedicated GPU with 6 GB or more of VRAM.
Photon Shader 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.
If frame rates dip, lower the shadow resolution and render distance first - both reclaim large amounts of performance on Photon Shader with little visible cost.
Photon Shader: common questions
What do I need to run Photon Shader?
Photon Shader is an Iris shader, so you need Fabric (or Quilt) plus the Iris Shaders mod. On the hardware side it lists RTX 3060 / RX 6700 XT with 6 GB of VRAM as a baseline.
Is Photon Shader good for low-end PCs?
Not really. Photon Shader is an ultra-impact shader built for capable hardware. Low-end machines can technically launch it but will struggle to hold a smooth frame rate.
Which Minecraft versions does Photon Shader support?
Photon Shader 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 Photon Shader?
The trade-offs worth knowing before you install are very demanding and requires high-end hardware. For most users the visual payoff outweighs these, but they are the points players raise most often.
How do I install Photon Shader?
Add Fabric and the Iris mod, then drop the Photon Shader .zip into your shaderpacks folder and select it under Video Settings, Shader Packs. Full steps are above.
What is Photon Shader best for?
Photon Shader is a high-end shader that delivers ray-traced or path-traced light that resolves accurate bounce lighting and reflections. It is ideal for enthusiasts with powerful graphics cards who want the very best image quality, and like other Minecraft shaders it is free to download from the official source linked above.
Related topics
Ready to install Photon Shader?
Follow our step-by-step guide to get shaders running on your Minecraft client.
Installation Guide