Ectoluminescence

The mod adds more uses for materials that have little purpose in vanilla, such as the Glow Ink Sac and the Phantom Membrane. Glow Ink Sacs and Phantom Membranes feed a set of new light sources, and the Membrane Echo Shard and a Glow Torch join the item list. A waterloggable torch variant glows less strongly than a Soul Torch on a surface but brighter than a regular torch placed in the same spot. Crafted Glow Ink Sac Sticks act as a further source of light for placed blocks.

Glow behavior is controlled per block or mob through optional NBT flags. A boolean flag decides whether a block glows, and a separate flag hides its background. The Decorated Pot is the only exception, since its sherd glow is set by a byte array with four values, one for each face. Commands can apply these settings, and the author notes that the glow of the Netherite Chestplate can be shown in rainbow colors, a result available only in creative mode. Installation runs on client and server, so the server and every player need the mod, and it is published for Fabric only.

The mod is released under the MIT License and is open source. Public source code and an issue tracker are linked from its page. Just Enough Items (JEI) is an optional dependency that adds the recipes for the new items to its viewer.