Selecting the Shader Pack
Once Vivid Luminous Skies Shaders is placed inside your shaderpacks folder and you are running Minecraft with a shader loader such as Iris or OptiFine, you can enable it directly from your pause menu. Open Options, click Video Settings, and enter the Shaders or Shader Packs screen. Select Vivid Luminous Skies Shaders from the list and apply your selection. Give the client a brief moment to reload your chunks and apply the lighting changes to standard vanilla blocks.
Verifying the Visual Changes
Load into an outdoor biome during daytime to check that every feature is working properly. You should immediately see brightened daytime views and realistic sun and sky lighting that keeps the classic vanilla look intact. Look underneath nearby tree canopies or beside your own player structures to confirm soft, natural shadows are rendering on the ground. Walk over to a river, pond, or coastline next; the water surface will appear cleaned up with clear reflections and gentle wave motions.