Hi everyone,

I’m currently developing a game using the **Invector Third Person Controller** asset, which has been fantastic for character movement and general gameplay functionality.

I’m now working on a new feature where the player can **buy land and build houses** in-game. For this, I’m using the **Easy Grid Builder Pro** asset, which lets me place and manage buildings in a grid-based system using third-person controls.

Here’s how it currently works:

* The player starts as the Invector character.
* They can walk up to a land purchase area.
* When the player presses **E**, the land is purchased (if they have enough money), and they are switched to the **Easy Grid Pro build mode**.
* This switches control to a different player prefab designed for building.
* In this mode, I can **place buildings and save progress** as expected.

**The Issue:**  
While in build mode, the Easy Grid Pro character **can’t move around the grid like in the demo scene**. The grid loads, the UI appears, and I can place buildings, but the character is stationary and can’t walk or navigate like they can in the default Easy Grid Pro demo.

When I exit build mode and switch back to the Invector character, everything works fine again — movement is restored and no errors occur.

I've already:

* Verified that only **one active EventSystem** is present at runtime.
* Created a custom script that handles the character switching via `OnTriggerEnter`, and it’s mostly working — the issue only happens during Easy Grid Pro movement.

Here’s the script I’m using to manage the switch between Invector and Easy Grid Pro characters:  
`using UnityEngine;`

`using TMPro;`

`using UnityEngine.EventSystems;`

`using UnityEngine.InputSystem.UI;`







`public class LandPurchaseAndBuildModeManager : MonoBehaviour`

`{`

`[Header("Player References")]`

`public GameObject invectorPlayer;`

`public GameObject easyGridPlayer;`



`[Header("Invector Dependencies")]`

`public GameObject vGameControllerExample;`

`public GameObject invectorCamera; // ✅ Reference to Invector camera`

   





`[Header("Easy Grid Dependencies")]`

`public GameObject playerFollowCamera;`

`public GameObject mainCamera;`

`public GameObject textUI;`

`public GameObject egbCursor;`

`public GameObject egbGridXZ;`

`public GameObject egbUIPrefab;`

`public GameObject gridManagers;`

`public GameObject buildModeEventSystem;`







`[Header("UI Prompt")]`

`public GameObject promptUI;`

`public TextMeshProUGUI promptText;`



`[Header("Wallet Reference")]`

`public PlayerWallet playerWallet;`



`[Header("Land Settings")]`

`public int landCost = 300;`



`private bool playerInTrigger = false;`

`private bool inBuildMode = false;`

`private bool landPurchased = false; // ✅ Track if the land is already owned`



`void Start()`

`{`

`promptUI.SetActive(false);`

`SwitchToInvectorMode(); // Default at start`



`}`



`void Update()`

`{`

`if (playerInTrigger && !inBuildMode)`

`{`

`if (Input.GetKeyDown(KeyCode.E))`

`{`

`if (landPurchased)`

`{`

`EnterBuildMode(); // ✅ Enter build mode directly if land is owned`

`}`

`else`

`{`

`TryPurchaseLand(); // ✅ Try to buy land`

`}`

`}`

`else if (Input.GetKeyDown(KeyCode.B))`

`{`

`CancelPrompt();`

`}`

`}`



`// Exit build mode if player presses B`

`if (inBuildMode && Input.GetKeyDown(KeyCode.B))`

`{`

`ExitBuildMode();`

`}`

`}`



`private void OnTriggerEnter(Collider other)`

`{`

`if (other.gameObject == invectorPlayer)`

`{`

`playerInTrigger = true;`

`promptUI.SetActive(true);`



`if (landPurchased)`

`promptText.text = "Enter building mode? Press E for Yes, B for No.";`

`else`

`promptText.text = $"Buy this land for ${landCost}? Press E to buy, B to cancel.";`

`}`

`}`



`private void OnTriggerExit(Collider other)`

`{`

`if (other.gameObject == invectorPlayer)`

`{`

`playerInTrigger = false;`

`promptUI.SetActive(false);`

`}`

`}`



`private void TryPurchaseLand()`

`{`

`if (playerWallet.currentMoney >= landCost)`

`{`

`playerWallet.SpendMoney(landCost);`

`landPurchased = true; // ✅ Mark land as owned`

`EnterBuildMode();`

`}`

`else`

`{`

`promptText.text = "Not enough money to buy this land!";`

`}`

`}`



`private void CancelPrompt()`

`{`

`promptUI.SetActive(false);`

`playerInTrigger = false;`

`}`



`private void EnterBuildMode()`

`{`

`inBuildMode = true;`

`promptUI.SetActive(false);`



`// Disable Invector Player and dependencies`

`invectorPlayer.SetActive(false);`

`vGameControllerExample.SetActive(false);`

`if (invectorCamera != null) invectorCamera.SetActive(false);`



`// ✅ Disable any Invector-spawned EventSystem`

`RemoveInvectorEventSystem();`





`// Enable Easy Grid Player and components`

`easyGridPlayer.SetActive(true);`

`playerFollowCamera.SetActive(true);`

`mainCamera.SetActive(true);`

`textUI.SetActive(true);`

`egbCursor.SetActive(true);`

`egbGridXZ.SetActive(true);`

`egbUIPrefab.SetActive(true);`

`gridManagers.SetActive(true);`

`if (buildModeEventSystem) buildModeEventSystem.SetActive(true);`



`FixEventSystemModules(); // ✅ Ensure Easy Grid EventSystem uses new Input System`





`}`



`private void ExitBuildMode()`

`{`

`inBuildMode = false;`



`// Disable Easy Grid Player and components`

`easyGridPlayer.SetActive(false);`

`playerFollowCamera.SetActive(false);`

`mainCamera.SetActive(false);`

`textUI.SetActive(false);`

`egbCursor.SetActive(false);`

`egbGridXZ.SetActive(false);`

`egbUIPrefab.SetActive(false);`

`gridManagers.SetActive(false);`

`if (buildModeEventSystem) buildModeEventSystem.SetActive(false);`



`// Enable Invector Player and dependencies`

`invectorPlayer.SetActive(true);`

`vGameControllerExample.SetActive(true);`

`if (invectorCamera != null) invectorCamera.SetActive(true);`







`}`



`private void SwitchToInvectorMode()`

`{`

`// Make sure only invector is active at game start`

`invectorPlayer.SetActive(true);`

`vGameControllerExample.SetActive(true);`

`if (invectorCamera != null) invectorCamera.SetActive(true);`



`easyGridPlayer.SetActive(false);`

`playerFollowCamera.SetActive(false);`

`mainCamera.SetActive(false);`

`textUI.SetActive(false);`

`egbCursor.SetActive(false);`

`egbGridXZ.SetActive(false);`

`egbUIPrefab.SetActive(false);`

`gridManagers.SetActive(false);`

`if (buildModeEventSystem) buildModeEventSystem.SetActive(false);`

`}`



`private void RemoveInvectorEventSystem()`

`{`

`EventSystem[] systems = FindObjectsOfType<EventSystem>();`

`foreach (var es in systems)`

`{`

`if (buildModeEventSystem != null && es.gameObject == buildModeEventSystem) continue;`

`Destroy(es.gameObject); // ✅ Fully remove Invector's runtime EventSystem`

`}`

`}`



`// ✅ Converts any EventSystem to use new Input System`

`private void FixEventSystemModules()`

`{`

`EventSystem[] systems = FindObjectsOfType<EventSystem>();`

`foreach (var es in systems)`

`{`

`var oldModule = es.GetComponent<StandaloneInputModule>();`

`if (oldModule != null)`

`{`

`Destroy(oldModule);`

`if (!es.GetComponent<InputSystemUIInputModule>())`

`{`

`es.gameObject.AddComponent<InputSystemUIInputModule>();`

`}`

`}`

`}`

`}`

`}`

If anyone has experienced this issue or knows what might be causing the Easy Grid Pro player to lose movement functionality during runtime switching, I’d appreciate the help. Is there something I’m missing regarding the character controller, input module, or initialization sequence for the Easy Grid Pro player?

Thanks in advance!

  





Easy Grid Pro Player Can’t Move After Switching from Invector Controller