How can I access material of a mesh renderer without receiving and instance of it?

I am trying to use the following code to determine whether or not there exists squares on my grid, vertically or horizontally, with the same colour as the current block i rest on.

for (int i = 0; i < GridBlocks.Count; i++) { if (GridBlocks[i].transform.position.z == CurrentGridBlock.transform.position.z && GridBlocks[i].GetComponent<MeshRenderer>().material == CurrentGridBlock.GetComponent<MeshRenderer>().material && CurrentGridBlock != GridBlocks[i]) { HorizontalSameColouredBlocks.Add(GridBlocks[i]); } else if (GridBlocks[i].transform.position.x == CurrentGridBlock.transform.position.x && GridBlocks[i].GetComponent<MeshRenderer>().material == CurrentGridBlock.GetComponent<MeshRenderer>().material && CurrentGridBlock != GridBlocks[i]) { VerticalSameColouredBlocks.Add(GridBlocks[i]); } if (HorizontalSameColouredBlocks.Count == Mathf.Sqrt(GridBlocks.Count) - 2 && VerticalSameColouredBlocks.Count == Mathf.Sqrt(GridBlocks.Count) - 2) { break; } }
However, the following line never returns true in either vertical or horizontal.

GridBlocks[i].GetComponent<MeshRenderer>().material == CurrentGridBlock.GetComponent<MeshRenderer>().material

This is because they both return separate instances of that same material. How can get this to ignore the different instances? I have tried just checking if the names are equivalent, this does not work either.

EDIT: Using sharedMaterial

I used .sharedMaterial to see if the outputs were equivalent of want i was testing. This is the output:
As you can see, the original set Gray blocks are reading without any instance, the current block that the player is standing on, reads a single instance, and any other colour in a row/column will read a doubled instance.
I changed this following line:
GridBlocks[i].GetComponent<MeshRenderer>().material == CurrentGridBlock.GetComponent<MeshRenderer>().material

To this:
GridBlocks[i].GetComponent<MeshRenderer>().sharedMaterial == CurrentGridBlock.GetComponent<MeshRenderer>().sharedMaterial

Please help :/ Edit 2: Displaying my entire code that has to be related to this problem

using System.Collections; using System.Collections.Generic; using UnityEngine; public class CubeMovement : MonoBehaviour { private List<GameObject> Pivots, GridBlocks, AvailableGridBlocks, HorizontalSameColouredBlocks, VerticalSameColouredBlocks, GridBlocksToReset; private GameObject Player, ChosenPivot, CurrentGridBlock; private Vector3 TouchPos, PlayerRotation; private MeshRenderer GridBlockMeshRenderer; private PlayerColourRandomizer ColourRandomizerScript; private float DistanceFromCurrentBlock; void Awake() { Pivots = new List<GameObject>(); GridBlocks = new List<GameObject>(); AvailableGridBlocks = new List<GameObject>(); HorizontalSameColouredBlocks = new List<GameObject>(); VerticalSameColouredBlocks = new List<GameObject>(); GridBlocksToReset = new List<GameObject>(); Pivots.AddRange(GameObject.FindGameObjectsWithTag("PivotPoint")); GridBlocks.AddRange(GameObject.FindGameObjectsWithTag("GridBlock")); Player = this.gameObject; ColourRandomizerScript = this.gameObject.GetComponent<PlayerColourRandomizer>(); } void Update() { if (Input.touchCount > 0) { Touch touch = Input.GetTouch(0); Ray ray = Camera.main.ScreenPointToRay(touch.position); Plane plane = new Plane(Vector3.up, transform.position); float distance = 0; if (touch.phase == TouchPhase.Moved) { if (plane.Raycast(ray, out distance)) { TouchPos = ray.GetPoint(distance); } } if (touch.phase == TouchPhase.Ended) { CheckSelectedGridBlock(); Roll(); } if (touch.phase == TouchPhase.Canceled) { ResetValues(); } } } public void SetInitialPlayerPosition() { int RandomStartingPosition = Random.Range(0, GridBlocks.Count); Player.transform.position = new Vector3(GridBlocks[RandomStartingPosition].transform.position.x, 0.5f, GridBlocks[RandomStartingPosition].transform.position.z); } public void SetInitialGridBlockColour() { for(int i = 0; i < GridBlocks.Count; i++) { if(GridBlocks[i].transform.position.x == Player.transform.position.x && GridBlocks[i].transform.position.z == Player.transform.position.z) { GridBlocks[i].GetComponent<MeshRenderer>().material = Player.GetComponent<MeshRenderer>().material; break; } } } public void SetBlackSquares() { int BlackSquaresInGame = Random.Range(2, 5); for (int i = 0; i < BlackSquaresInGame; i++) { int GridBlockPlacement = Random.Range(0, GridBlocks.Count); while (GridBlocks[GridBlockPlacement].transform.position.x == Player.transform.position.x && GridBlocks[GridBlockPlacement].transform.position.z == Player.transform.position.z || GridBlocks[GridBlockPlacement].transform.position.x == Player.transform.position.x - 1f && GridBlocks[GridBlockPlacement].transform.position.z == Player.transform.position.z || GridBlocks[GridBlockPlacement].transform.position.x == Player.transform.position.x + 1f && GridBlocks[GridBlockPlacement].transform.position.z == Player.transform.position.z || GridBlocks[GridBlockPlacement].transform.position.x == Player.transform.position.x && GridBlocks[GridBlockPlacement].transform.position.z == Player.transform.position.z - 1f || GridBlocks[GridBlockPlacement].transform.position.x == Player.transform.position.x && GridBlocks[GridBlockPlacement].transform.position.z == Player.transform.position.z + 1f) { GridBlockPlacement = Random.Range(0, GridBlocks.Count); } GridBlocks[GridBlockPlacement].GetComponent<MeshRenderer>().material = Resources.Load<Material>("Materials/BlackSquare"); } } public void SetupPivots() { for(int i = 0; i < Pivots.Count; i++) { if (Pivots[i].name.Contains("Up")) { Pivots[i].transform.position = new Vector3(Player.transform.position.x, Player.transform.position.y - 0.5f, Player.transform.position.z + 0.5f); } else if(Pivots[i].name.Contains("Down")) { Pivots[i].transform.position = new Vector3(Player.transform.position.x, Player.transform.position.y - 0.5f, Player.transform.position.z - 0.5f); } else if(Pivots[i].name.Contains("Left")) { Pivots[i].transform.position = new Vector3(Player.transform.position.x - 0.5f, Player.transform.position.y - 0.5f, Player.transform.position.z); } else if (Pivots[i].name.Contains("Right")) { Pivots[i].transform.position = new Vector3(Player.transform.position.x + 0.5f, Player.transform.position.y - 0.5f, Player.transform.position.z); } } } public void CheckAavailableMovements() { if (AvailableGridBlocks.Count > 0) { for(int i = 0; i < AvailableGridBlocks.Count; i++) { GridBlockMeshRenderer = AvailableGridBlocks[i].GetComponent<MeshRenderer>(); if (GridBlockMeshRenderer.material.name.Contains("GrayAvailable")) { GridBlockMeshRenderer.material = Resources.Load<Material>("Materials/GraySquare"); } else if (GridBlockMeshRenderer.material.name.Contains("BlackAvailable")) { GridBlockMeshRenderer.material = Resources.Load<Material>("Materials/BlackSquare"); } } AvailableGridBlocks.Clear(); } for (int i = 0; i < GridBlocks.Count; i++) { GridBlockMeshRenderer = GridBlocks[i].GetComponent<MeshRenderer>(); if (Player.transform.position.x == GridBlocks[i].transform.position.x - 1 && Player.transform.position.z == GridBlocks[i].transform.position.z || Player.transform.position.x == GridBlocks[i].transform.position.x + 1 && Player.transform.position.z == GridBlocks[i].transform.position.z || Player.transform.position.x == GridBlocks[i].transform.position.x && Player.transform.position.z == GridBlocks[i].transform.position.z - 1 || Player.transform.position.x == GridBlocks[i].transform.position.x && Player.transform.position.z == GridBlocks[i].transform.position.z + 1) { if (GridBlockMeshRenderer.material.name.Contains("Gray")) { AvailableGridBlocks.Add(GridBlocks[i]); GridBlockMeshRenderer.material = Resources.Load<Material>("Materials/GrayAvailableSquare"); } else if (GridBlockMeshRenderer.material.name.Contains("Black")) { AvailableGridBlocks.Add(GridBlocks[i]); GridBlockMeshRenderer.material = Resources.Load<Material>("Materials/BlackAvailableSquare"); } } if (AvailableGridBlocks.Count == 4) { break; } } } private void CheckSelectedGridBlock() { for (int i = 0; i < AvailableGridBlocks.Count; i++) { if (TouchPos.x > AvailableGridBlocks[i].transform.position.x - 0.5f && TouchPos.x < AvailableGridBlocks[i].transform.position.x + 0.5f && TouchPos.z > AvailableGridBlocks[i].transform.position.z - 0.5f && TouchPos.z < AvailableGridBlocks[i].transform.position.z + 0.5f) { CurrentGridBlock = AvailableGridBlocks[i]; for(int j = 0; j < Pivots.Count; j++) { if (CurrentGridBlock.transform.position.x < Player.transform.position.x && CurrentGridBlock.transform.position.z == Player.transform.position.z && Pivots[j].transform.position.x < Player.transform.position.x) { ChosenPivot = Pivots[j]; break; } else if (CurrentGridBlock.transform.position.x > Player.transform.position.x && CurrentGridBlock.transform.position.z == Player.transform.position.z && Pivots[j].transform.position.x > Player.transform.position.x) { ChosenPivot = Pivots[j]; break; } else if (CurrentGridBlock.transform.position.z < Player.transform.position.z && CurrentGridBlock.transform.position.x == Player.transform.position.x && Pivots[j].transform.position.z < Player.transform.position.z) { ChosenPivot = Pivots[j]; break; } else if (CurrentGridBlock.transform.position.z > Player.transform.position.z && CurrentGridBlock.transform.position.x == Player.transform.position.x && Pivots[j].transform.position.z > Player.transform.position.z) { ChosenPivot = Pivots[j]; break; } } break; } else if (i == AvailableGridBlocks.Count - 1) { CurrentGridBlock = null; } } } private void Roll() { StartCoroutine(Move()); } private void ChangeCurrentGridBlockColour() { if (!CurrentGridBlock.GetComponent<MeshRenderer>().material.name.Contains("Black")) { CurrentGridBlock.GetComponent<MeshRenderer>().material = Player.GetComponent<MeshRenderer>().material; } else if (CurrentGridBlock.GetComponent<MeshRenderer>().material.name.Contains("Black")) { } } private void ClearLinedBlocks() { if (CurrentGridBlock != null) { for (int i = 0; i < GridBlocks.Count; i++) { if (GridBlocks[i].transform.position.z == CurrentGridBlock.transform.position.z) { Debug.Log("VERTICAL -- GridBlock: " + GridBlocks[i].GetComponent<MeshRenderer>().sharedMaterial); Debug.Log("Current: " + CurrentGridBlock.GetComponent<MeshRenderer>().sharedMaterial); Debug.Log(GridBlocks[i].GetComponent<MeshRenderer>().sharedMaterial == CurrentGridBlock.GetComponent<MeshRenderer>().sharedMaterial); } if (GridBlocks[i].transform.position.x == CurrentGridBlock.transform.position.x) { Debug.Log("HORIZONTAL -- GridBlock: " + GridBlocks[i].GetComponent<MeshRenderer>().sharedMaterial); Debug.Log("Current: " + CurrentGridBlock.GetComponent<MeshRenderer>().sharedMaterial); Debug.Log(GridBlocks[i].GetComponent<MeshRenderer>().sharedMaterial == CurrentGridBlock.GetComponent<MeshRenderer>().sharedMaterial); } if (GridBlocks[i].transform.position.z == CurrentGridBlock.transform.position.z && GridBlocks[i].GetComponent<MeshRenderer>().sharedMaterial == CurrentGridBlock.GetComponent<MeshRenderer>().sharedMaterial && CurrentGridBlock != GridBlocks[i]) { HorizontalSameColouredBlocks.Add(GridBlocks[i]); } else if (GridBlocks[i].transform.position.x == CurrentGridBlock.transform.position.x && GridBlocks[i].GetComponent<MeshRenderer>().sharedMaterial == CurrentGridBlock.GetComponent<MeshRenderer>().sharedMaterial && CurrentGridBlock != GridBlocks[i]) { VerticalSameColouredBlocks.Add(GridBlocks[i]); } if (HorizontalSameColouredBlocks.Count == Mathf.Sqrt(GridBlocks.Count) - 2 && VerticalSameColouredBlocks.Count == Mathf.Sqrt(GridBlocks.Count) - 2) { break; } } if (HorizontalSameColouredBlocks.Count >= 2) { DistanceFromCurrentBlock = 1; GridBlocksToReset.Add(CurrentGridBlock); for (int i = 0; i < HorizontalSameColouredBlocks.Count; i++) { if (CurrentGridBlock.transform.position.x - HorizontalSameColouredBlocks[i].transform.position.x == DistanceFromCurrentBlock) { GridBlocksToReset.Add(HorizontalSameColouredBlocks[i]); HorizontalSameColouredBlocks.RemoveAt(i); DistanceFromCurrentBlock++; i = 0; } else if (i == HorizontalSameColouredBlocks.Count - 1 && DistanceFromCurrentBlock > 0) { DistanceFromCurrentBlock = -1; for (int j = 0; j < HorizontalSameColouredBlocks.Count; j++) { if (CurrentGridBlock.transform.position.x - HorizontalSameColouredBlocks[i].transform.position.x == DistanceFromCurrentBlock) { GridBlocksToReset.Add(HorizontalSameColouredBlocks[i]); DistanceFromCurrentBlock--; j = 0; } } } } if (GridBlocksToReset.Count >= 3) { foreach (GameObject x in GridBlocksToReset) { x.GetComponent<MeshRenderer>().material = Resources.Load<Material>("Materials/GraySquare"); } } GridBlocksToReset.Clear(); } if (VerticalSameColouredBlocks.Count >= 2) { DistanceFromCurrentBlock = 1; GridBlocksToReset.Add(CurrentGridBlock); for (int i = 0; i < VerticalSameColouredBlocks.Count; i++) { if (CurrentGridBlock.transform.position.x - VerticalSameColouredBlocks[i].transform.position.x == DistanceFromCurrentBlock) { GridBlocksToReset.Add(VerticalSameColouredBlocks[i]); VerticalSameColouredBlocks.RemoveAt(i); DistanceFromCurrentBlock++; i = 0; } else if (i == VerticalSameColouredBlocks.Count - 1 && DistanceFromCurrentBlock > 0) { DistanceFromCurrentBlock = -1; for (int j = 0; j < VerticalSameColouredBlocks.Count; j++) { if (CurrentGridBlock.transform.position.x - VerticalSameColouredBlocks[i].transform.position.x == DistanceFromCurrentBlock) { GridBlocksToReset.Add(VerticalSameColouredBlocks[i]); DistanceFromCurrentBlock--; j = 0; } } } } if (GridBlocksToReset.Count >= 3) { foreach (GameObject x in GridBlocksToReset) { x.GetComponent<MeshRenderer>().material = Resources.Load<Material>("Materials/GraySquare"); } } GridBlocksToReset.Clear(); } VerticalSameColouredBlocks.Clear(); HorizontalSameColouredBlocks.Clear(); } } private void FixFloatingPointPrecision() { Player.transform.position = new Vector3(Mathf.Round(Player.transform.position.x), 0.5f, Mathf.Round(Player.transform.position.z)); PlayerRotation = transform.eulerAngles; PlayerRotation.x = Mathf.Round(PlayerRotation.x / 90) * 90; PlayerRotation.y = Mathf.Round(PlayerRotation.y / 90) * 90; PlayerRotation.z = Mathf.Round(PlayerRotation.z / 90) * 90; transform.eulerAngles = PlayerRotation; } private void ResetValues() { TouchPos = Vector3.zero; ChosenPivot = null; CurrentGridBlock = null; GridBlockMeshRenderer = null; } IEnumerator Move() { if (CurrentGridBlock != null) { if (ChosenPivot.name.Contains("Up")) { for (int i = 0; i < 10; i++) { Player.transform.RotateAround(ChosenPivot.transform.position, Vector3.right, 9f); yield return new WaitForSeconds(0.01f); } FixFloatingPointPrecision(); ChangeCurrentGridBlockColour(); } else if (ChosenPivot.name.Contains("Down")) { for (int i = 0; i < 10; i++) { Player.transform.RotateAround(ChosenPivot.transform.position, Vector3.left, 9f); yield return new WaitForSeconds(0.01f); } FixFloatingPointPrecision(); ChangeCurrentGridBlockColour(); } else if (ChosenPivot.name.Contains("Right")) { for (int i = 0; i < 10; i++) { Player.transform.RotateAround(ChosenPivot.transform.position, Vector3.back, 9f); yield return new WaitForSeconds(0.01f); } FixFloatingPointPrecision(); ChangeCurrentGridBlockColour(); } else if (ChosenPivot.name.Contains("Left")) { for (int i = 0; i < 10; i++) { Player.transform.RotateAround(ChosenPivot.transform.position, Vector3.forward, 9f); yield return new WaitForSeconds(0.01f); } FixFloatingPointPrecision(); ChangeCurrentGridBlockColour(); } ClearLinedBlocks(); SetupPivots(); CheckAavailableMovements(); ColourRandomizerScript.RandomizeNextColour(); } ResetValues(); } }

The part that this problem occurs is under the function ClearLinedBlocks(), perhaps the problem is caused elsewhere, I don't know any help would be appreciated, even if I can be suggested a new way to get the right output!