Reactor Glass is the transparent shell block of the reactor room in the Ala Industrial mod for Minecraft 26.2 Java Edition. To the room scanner, Reactor Glass is a wall in the full sense, equal to Reactor Casing: a cell with glass stays sealed, and a window of any reasonable size does not stop the room from forming. The single restriction is a share — glass may cover at most 30 % of the shell's cells, floor and ceiling included. On the smallest room of 98 shell cells that budget is 29 panes: one solid 5×5 face plus a window or two, while two solid glass faces are already over the line. Vanilla Glass never passes the scan: the controller reads it as a breach, the same as any foreign block.

The recipe is one Shielding Plate in the centre of a crafting table ringed by eight colourless glass blocks, and one craft yields eight Reactor Glass — 0.125 of a plate per block against 0.25 for Reactor Casing, half the palladium per window cell. That discount is exactly why the share cap exists: without the cap a glass box would be the cheapest shell, and a window would stop being a window. Reactor Glass is not a weak spot either: hardness 5.0 and blast resistance 30.0 match the casing, a pickaxe is required for the drop, and light passes through, so the water and steam levels of the Reactor Column stay readable from outside. Ala Industrial runs on Fabric and NeoForge, and Reactor Glass itself is passive — no energy buffer, no cables, no tier.