Because you are looking through "solid" blocks, the game engine doesn't calculate light for those areas correctly. Using a "FullBright" mod or texture pack alongside the X-ray pack is highly recommended to see clearly in the dark.
If you use OptiFine for 1.8.8, it often improves how these packs render and provides a built-in "Brightness" slider that helps visibility. Usage Warning xray texture pack 188 work
Installing the X-Ray Texture Pack 1.8.8 is a relatively straightforward process. Here's a step-by-step guide: Because you are looking through "solid" blocks, the
X-ray texture packs, such as XRay Ultimate , are specialized resource packs designed to grant players a visual advantage by making common environmental blocks transparent while keeping valuable ores and structures visible. Core Mechanism of Functionality such as XRay Ultimate