Once Pure PBR Shaders is placed in your shaderpacks folder alongside a shader loader such as Iris or OptiFine, you need to activate it in your video menu and confirm that block materials are rendering properly.
Activating the Shader Pack
1. Open the pause menu, go to Options, and select Video Settings.
2. Click the Shaders or Shader Packs button to view your installed packs.
3. Select Pure PBR Shaders from the list and click Done or Apply so the game reloads the lighting engine.
Testing Material Properties in Your World
Because the shader processes blocks according to their surface properties and real-world physics rules, you can run a quick check in a creative or survival world to see the effects in action:
- Check metallic highlights: Place a Block of Iron, Block of Gold, or Copper block outdoors under direct sunlight or moonlight. Move your camera around the block to observe crisp highlights shifting across the faces.
- Compare terrain grounding: Look at where your exterior walls meet the ground; bounced sky light and sunlight should blend your structures naturally into the surrounding landscape.