HostileMobSpawning 1.15.X Optifine is a release file of the Minecraft resource pack HostileMobSpawning, made for Minecraft 1.15-Snapshot, 1.15, 1.15.2, 1.15.1. It was published on July 6, 2021 and is 0 MB in size. For the full description, screenshots and every other version, visit the HostileMobSpawning resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.