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NitroxPatcher/Patches/Dynamic/SubRoot_SetCyclopsUpgrades_Patch.cs

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+using System.Reflection;
+using NitroxModel.Helper;
+
+namespace NitroxPatcher.Patches.Dynamic;
+
+/// <summary>
+/// The way Subnautica handles modules in Cyclops wrecks is pretty weird. if any module is added/removed (and when spawning
+/// the entity during joining), they are all instantly disabled, which deletes creature decoys in any slot except
+/// the first one. We want to keep the creature decoys around if the module is inserted, so we allow use of that
+/// module even when the Cyclops has been destroyed.
+/// </summary>
+public sealed partial class SubRoot_SetCyclopsUpgrades_Patch : NitroxPatch, IDynamicPatch
+{
+    private static readonly MethodInfo TARGET_METHOD = Reflect.Method((SubRoot t) => t.SetCyclopsUpgrades());
+
+    public static void Postfix(SubRoot __instance)
+    {
+        if (__instance.upgradeConsole == null)
+        {
+            return;
+        }
+
+        __instance.decoyTubeSizeIncreaseUpgrade = false;
+
+        Equipment modules = __instance.upgradeConsole.modules;
+        foreach (string slot in SubRoot.slotNames)
+        {
+            TechType techTypeInSlot = modules.GetTechTypeInSlot(slot);
+            if (techTypeInSlot == TechType.CyclopsDecoyModule)
+            {
+                __instance.decoyTubeSizeIncreaseUpgrade = true;
+                break;
+            }
+        }
+    }
+}