Once the shader pack file is placed inside your Minecraft shaderpacks folder alongside a compatible shader loader such as Iris or OptiFine, you need to activate it through your in-game menus and confirm its effects are working properly.
Activating the Shader Pack
1. Launch Minecraft and load into a world or stay on the main title screen.
2. Open Options, then select Video Settings.
3. Click on Shaders or Shader Packs depending on which shader loader you have installed.
4. Select Vivid Fluid Rays from the list of available packs and apply your changes.
5.
Checking That Visual Effects Are Active
To make sure the shader pack is rendering properly rather than falling back to vanilla graphics, walk to an open area with trees and a body of water:
- Water surfaces: Look at a river, lake, or ocean. Instead of opaque vanilla textures, you should see transparent water with gentle waves and clean surface reflections.
- Light rays: Stand beneath tree canopies during the day or under a clear moon at night. You should notice distinct sunlight or moonlight rays filtering through the leaves.
- Shadows and blocks: Check nearby terrain to confirm soft shadow tones and pleasant colors are present while your blocks still retain their classic vanilla look.