ReplicateUsing - Doesn't replicate material

Development Rendering
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1

Hello,
I created two teams in my game. I wanted to assign two colors for each team as they spawn in but I have problems with material replication.

In Character I made this:

Character.h

UFUNCTION(reliable, Server, WithValidation)
	void SERVER_SetMaterial(AMyPlayerController* PC);
	void SERVER_SetMaterial_Implementation(AMyPlayerController* PC);
	bool SERVER_SetMaterial_Validate(AMyPlayerController* PC) {return true;};


	UPROPERTY(ReplicatedUsing = OnRep_CheckTeam)
	bool  CheckTeam;

	UPROPERTY(Replicated)
	UMaterialInstance * MI;

	UFUNCTION()
	virtual void OnRep_CheckTeam();

Character.cpp

void AProjekat2Character::GetLifetimeReplicatedProps(TArray< FLifetimeProperty > & OutLifetimeProps) const
{
	Super::GetLifetimeReplicatedProps(OutLifetimeProps);
	DOREPLIFETIME(AProjekat2Character, MI);
	DOREPLIFETIME(AProjekat2Character, CheckTeam);
	
}
void AProjekat2Character::SERVER_SetMaterial_Implementation(AMyPlayerController* PC)
{
	if (Role== ROLE_Authority) 
	{
		MI = nullptr;
		AMyPlayerState * PS = Cast<AMyPlayerState>(PC->PlayerState);
		AMyPlayerController * PlayerContr = Cast<AMyPlayerController>(PC);
		if (PS->bTeamB == 1)
		{
			MI = (UMaterialInstance*)PlayerContr->TheMaterialA;
			CheckTeam = !CheckTeam;
			OnRep_CheckTeam();
		}
		else if (PS->bTeamB == 2)
		{	
			MI = (UMaterialInstance*)PlayerContr->TheMaterialB;
			CheckTeam = !CheckTeam;
			OnRep_CheckTeam();
		}
	}
}

void AProjekat2Character::OnRep_CheckTeam()
{
	if (MI != nullptr)
		this->GetMesh()->SetMaterial(0, MI);
}

When I call SERVER_SetMaterial(AMyPlayerController* PC) it should be executed on Server, and it should set up replicated property UMaterialInstance * MI; and change the state of bool CheckTeam;. As I read on instructions ReplicateUsing function will execute on clients when the state of bool is changed on the server, but nothing happens in my case. Everything I get is correct colors on the server because I called void OnRep_CheckTeam(); from the server side.

Can some1 give me words of advice, where I made mistake?

Thanks in advance! :slight_smile: