This is rare for resource packs, but some competitive servers (like Hypixel Skyblock) check for gamma manipulation. If this happens, revert to default resources. For most PvE or modded servers, you are safe.
: Some versions of Fullbright for 1.12.2 may require OptiFine to function correctly. fullbright 1122 resource pack full
Installing the pack is a straightforward process that follows the standard Minecraft resource pack workflow: This is rare for resource packs, but some