Enabling Derivative Reborn Shaders and Checking Water Reflections

Activating the Pack in Video Settings

Once your shader loader such as Iris or OptiFine is running and the pack is in your shaderpacks folder, load into a world and press Esc to open the pause menu. Select Options, open Video Settings, and click the Shaders menu. Highlight Derivative Reborn Shaders in the pack list and apply your changes to reload the world rendering. If you want to customize how the pack behaves, open the shader pack settings menu on that same screen to adjust the available options for your hardware.

Verifying Surface and Edge Fixes

Head to the nearest ocean, river, or lake to make sure the lighting and water effects are working properly. Stand near the shoreline and angle your camera so the water meets the far left and right sides of your monitor. Derivative Reborn Shaders prevents screen-edge stretching and removes the black boxes that often appear at monitor borders near water. Look across the ripples toward nearby trees, hills, or buildings to see sharp screen space reflections mirroring the sky and landscape cleanly across the moving water surface.