Changes from 3.x to 4.0

Version 4.0 is a rework of Open Modular Turrets 3.2 and Open Modular Passive Defense. It exists for Minecraft 1.12.2 (Forge) and as a port to Minecraft 1.20.1, 1.21.1 and 1.21.11 (Fabric, NeoForge and Forge). This page follows the 1.20.1+ changes; most of them were brought to 1.12.2 4.0 as well, see its CHANGELOG for the exact list. Item and block IDs were flattened (e.g. turret_base with meta 0–4 became turret_base_tier_one … turret_base_tier_five); the full table is in docs/id-mapping.md. This page lists what works differently for players coming from 3.x. The full list of changes is in the CHANGELOG.

Merged and bundled mods

• 1.20.1+: Open Modular Passive Defense is part of OMT now (hardened blocks, walls, fences, camouflage trap), see Passive Defense.
• 1.20.1+: OMLib is bundled inside the OMT jar. On 1.12.2 both stay separate mods.

New

• Generator with 9 fuel slots and the Energy Multiplier upgrade, see Generator and Energy.
• Inventory expanders (tiers 1–3) that enlarge the ammo slots of bases and the fuel slots of generators.
• Crossbow Turret with its own Crossbow Bolt ammo; recipes for the melee, crossbow, arc and plasma turrets.
• Creative upgrade: full energy and no ammo usage.
• Camouflage menu for bases and traps: any full block (opaque or transparent), plus light value and opacity on tier 4/5 bases and traps, see Camouflage.
• The Memory Card also stores mode, disguise and light, and works on camouflage traps, see Memory Card.
• Camouflage traps have their own trust list.
• Claiming unowned blocks, disowning and the Ownership Wand for map makers, see Ownership and Trusted Players.
• Placement outline when holding a turret next to a base.
• Sort Ammo button, Jade support, detailed Shift tooltips.
• Turret API for other mods, see Turret API.
• Contraption support (Create, Create Aeronautics, Sable).

Changed

• The Relativistic Turret is now the Slowing Turret.
• The Melee Turret only mounts on top of or below a base and hits everything in a 3×2×3 area without needing a target.
• The Rail Gun ignores Scatter Shot upgrades, as do the Melee, Slowing and Teleporter turrets.
• The Arc Turret jumps up to two times.
• Targeting priorities are added up instead of multiplied, see Targeting System.
• Loot: turret kills drop nothing unless the base has a Fake Drops addon; each further addon adds one level of Looting.
• Turret hits no longer knock targets back.
• Projectile turrets lead their targets and compensate for drop.
• Bases store much more energy, tier 4 and 5 bases hold 2 stacks per ammo slot.
• Fence damage grows with the tier (5 to 9).
• Only base admins can attach turrets; hoppers and pipes can no longer pull ammo out of a base.
• The config is a single documented JSON file, see Configuration.

Removed

• 1.20.1+: OpenComputers / ComputerCraft integration and the Serial Port addon (they remain on 1.12.2), see OC CC Functions.
• The Potentia addon (it already had no function in 3.x).