Alternatively, if you’ve made your own, could you share the lightmap.png file or explain the exact RGB values that work for 1.12.2?
If you are looking for maximum utility during survival gameplay, some packs combine X-Ray capabilities (making stone blocks transparent) with Fullbright. Note: Use these with caution, as X-Ray packs are strictly banned on almost all public multiplayer servers. Step-by-Step Installation Guide for 1.12.2 minecraft 1.12.2 fullbright texture pack
The world was glowing .