Radiante

First launch

• The game must run on Vulkan. On OpenGL a screen explains it and offers to switch and restart.
• If your GPU has no hardware ray tracing, you get "Radiante: ray tracing unavailable" and the game carries on with Minecraft's own renderer.
• Otherwise it turns on as soon as you enter a world, on RT-DLSS if your GPU supports it.

F6

Open Radiante settings

F7

Turn ray tracing on or off

Quality & Upscaling

• Pipeline

  Which denoiser and upscaler the engine uses. Only the ones your GPU can run are listed. RT-DLSS does both with DLSS Ray Reconstruction; the others pair the NRD denoiser with no upscaler, FSR 3 or XeSS, all of which work on any vendor.

  RT-DLSSRT-NRDRT-NRD-FSRRT-NRD-XeSS

• DLSS Mode

  Internal resolution before upscaling. Quality is sharpest and costs most; Ultra Performance is fastest and softest.

  Only with Pipeline set to RT-DLSS.

  Ultra PerformancePerformanceBalancedQuality

• Frame Generation

  DLSS inserts generated frames between rendered ones: smoother motion on high refresh monitors, a little more input latency.

  RT-DLSS, NVIDIA and Fabric only. The first time it is turned on needs a restart.

  Off2x3x4x

• NVIDIA Reflex

  Low latency mode: holds the CPU back so each frame starts as late as the GPU allows, cutting input lag.

  NVIDIA and Fabric only. The first time it is turned on needs a restart.

  Off

Image

• Picture Style

  Sets Saturation, Bounced Light, Sky Light and Tone Mapping together. See Picture styles below.

  NaturalBedrockVivid

• Tone Mapping

  How bright light is fitted to the screen. PBR Neutral keeps colours true, ACES is filmic with more contrast, Reinhard is soft and flat.

  PBR NeutralACESReinhard

• Saturation

  How colourful the image is. 100% leaves it unchanged.

  120%50%200%

• Eye Adaptation

  How far exposure follows what you look at. Lower keeps dark rooms dark and daylight bright, as in Bedrock.

  50%0%100%

• Exposure

  Overall brightness, in photographic stops.

  +0.7 EV-3 EV3 EV

• Motion Blur

  Smears moving things along their motion, like a camera. Changing it rebuilds the shaders.

  Off

• Depth of Field

  Keeps the centre of the screen sharp and blurs what is much nearer or farther. Changing it rebuilds the shaders.

  Off

Lighting

• Day Brightness

  Sunlight and daytime sky, as a share of the shader pack's own.

  25%0%400%

• Night Brightness

  Moonlight and night sky.

  35%0%400%

• Light Source Brightness

  Torches, lava, glowstone and other light-emitting blocks.

  12%0%400%

• Held Light Brightness

  What you hold: its own glow and the light it casts around you.

  12%0%400%

• Bounced Light

  How much light carries on after bouncing. Higher fills rooms from one patch of sun, as Bedrock RTX does; 100% is physically based.

  150%50%200%

• Sky Light

  How strongly the open sky lights the world. Higher brightens shade under trees and roofs.

  180%50%400%

• Block Light Sampling

  Surfaces aim a shadow ray at a nearby light instead of waiting for a random bounce to find it. Far less noise at night and in caves, for a small cost.

  Needs Block Emission (Performance).

  On

• Held Item Light

  A torch, lantern or other light held in either hand lights its surroundings.

  On

• Pixelated Lighting

  Snaps light and shadow to the texture's pixel grid for a retro, blocky look, like BetterRTX's pixelated lighting.

  Off

• First Person Shadow

  Draws you for shadows and reflections in first person. Without it you cast no shadow and do not show in water or glass.

  On

Sky, Fog & Water

• Atmosphere

  Bedrock uses Bedrock RTX's sky and sunlight colours when their files are available; Java uses Radiante's own sky. Without the files it falls back to Java.

  JavaBedrock

• Clouds

  Volumetric clouds are real 3D clouds that cast shadows and cost the most; vanilla are the usual cells, traced and lit; off is fastest.

  OffVanillaVolumetric

• Sun Glow

  The halo around the sun.

  100%0%300%

• Light Shafts

  Beams through windows, skylights and leaves.

  Needs Volumetric Fog.

  100%0%400%

• Vanilla Sun Path

  Sun and moon pass straight overhead. Off, the path leans ten degrees south so noon shadows are not straight down.

  On

• Vanilla Sun/Moon Rotation

  Sun and moon squares stay lined up with their path instead of turning as they cross the sky.

  On

• Biome Fog

  Per-biome haze in every dimension: warm dust over deserts, green air over swamps, purple haze in the End. Stays out of overworld caves.

  On

• Biome Fog Strength

  How thick that haze is. No effect on performance.

  100%0%400%

• Volumetric Fog

  Ray marches the air like Bedrock RTX: sunlight and moonlight scatter in the fog and terrain casts light shafts through it. Overworld only; noticeably more GPU time.

  On

• Volumetric Fog Strength

  How thick the air that shows sunbeams is. No effect on performance.

  100%0%400%

• Water Waves

  How rough the surface is. 0% is a flat mirror.

  100%0%400%

• Water Murkiness

  How fast the view fades underwater. Lower is clearer.

  100%0%500%

• Underwater Light Rays

  Sunbeams through the surface while you are underwater.

  100%0%400%

Performance

• Light Bounces

  How many times light bounces. 4 to 2 is about +55% FPS, 4 to 1 about +130%, with little visible change; rooms lit only by bounced light get a bit darker.

  414

• Carved Surfaces

  Depth on resource pack textures with height maps. Off is flat and a little faster; no effect without such a pack.

  On

• Volumetric Fog Quality

  Samples per ray. Fewer is faster and slightly noisier; 32 costs about 30% more than 16.

  16432

• Chunk Threads

  CPU threads that turn chunks into ray tracing geometry. More loads new areas faster but competes with the game. Capped at half your logical cores, because more only slows rendering.

  Depends on your CPU

• Chunk Batch Size

  Sections per acceleration structure build. Higher fills the world faster but can spike frame time while loading.

  12164

• Chunk Batches

  Builds in flight on the GPU at once. Higher loads faster and uses more video memory; lower it if you run out of VRAM.

  12164

• Block Emission

  Light-giving blocks light up the world around them. Off saves a little but sources only glow themselves.

  On

Other

• Block Outline

  The outline around the block under the crosshair.

  Off

• See-through Parallax Edges

  With carved resource packs, the carved outer edges of a block become see-through, as if really cut away.

  Off

• Debug Logging

  Writes detailed diagnostics to the log. Turn it on before reproducing a problem you want to report.

  Off

HDR

At the bottom of the Image section. Sunlight, lava and reflections go brighter than white on an HDR display.

• HDR Output

  Needs HDR turned on in Windows display settings for that monitor.

  Applies after restarting the game.

  Off

• HDR Peak Brightness

  The brightest your display can show; highlights are fitted under it. Check its specs or Windows HDR Calibration.

  1000 nits400 nits4000 nits

• HDR Paper White

  How bright menus, text and ordinary surfaces are. Raise it in a bright room, lower it in a dark one.

  200 nits80 nits400 nits

• HDR Debug View

  Tints blue everything shown in SDR, so what keeps its colour is the world in HDR. Not saved.

  Off

Quality levels

Measured on one scene: from Ultra Performance, Performance costs about 45% of the frame rate and Quality about 65%. Block light sampling is on at every level.

Picture styles

• Natural is physically correct light and colour, with nothing tuned on top.
• Bedrock matches Bedrock RTX: more saturated, with brighter shade and bounced light than physics would give.
• Vivid adds contrast through ACES and more colour, without Bedrock's extra sky light.

Using a .mcpack

1. Drop the .mcpack into the resourcepacks folder as it is. No unzipping or renaming.
2. Enable it in the resource pack menu, where it shows up directly.
3. The first time, it is converted and cached in radiante/bedrock_packs/. It is only converted again if the pack changes.

Colour, metalness, emission, roughness, subsurface and normals are carried over, along with the pack's per-biome fog.

Bedrock sky and caustics

With Atmosphere set to Bedrock, Radiante looks for sky.png, look_up_tables.png and caustics.png here, in order:

<game folder>/radiante/bedrock/
C:/XboxGames/Minecraft for Windows/Content/data/ray_tracing/