[Filtering Enabled] Hide Other Players. Any help?

In this script there are 3 simple things that are suppose to happen. If your on :

player.PlayerService.PlayerTeam.Value = BrickColor.new"White"

then all other players are completely invisible.

If you are on:

player.PlayerService.PlayerTeam.Value = BrickColor.new"Medium stone grey"

then everyone is completely visible

If you are on:

player.PlayerService.PlayerTeam.Value = BrickColor.new"Bright red"

Then all other players are transparent and red

I have tested this script in studio with a server of 2 players, it worked in both cases. But when I asked my brother and sister to test it with me the transparency part didn't work, but when the game started one of them turned transparent red. My game is set up very specifically with lots of int values and string values for the players. If you have any questions on why something is the way it is, ill answer that question.

Here is the script:

local player = game.Players.LocalPlayer
local char = player.Character
wait()

for _, v in pairs(game.Players:GetChildren()) do
	if v.Name == player.Name then
		wait()
	elseif v:IsA'Player' then
		for p, t in pairs (v.Character:GetChildren()) do
			if t:IsA'Part' then
				t.Transparency = 1
			elseif t:IsA'Hat' then
				t.Handle.Transparency = 1
				v.Head.Face.Transparency = 1
			end
		end
	end
end
	
game.Players.PlayerAdded:connect(function (newPlayer)
if player.PlayerService.PlayerTeam.Value == BrickColor.new("White") then
		for _, v in pairs(game.Players:GetChildren()) do
			if v.Name == player.Name then
				wait()
			elseif v:IsA'Player' then
				for p, t in pairs (v.Character:GetChildren()) do
					if t:IsA'Part' then
					t.Transparency = 1
					elseif t:IsA'Hat' then
						t.Handle.Transparency = 1
						v.Head.Face.Transparency = 1
					end
				end
			end
		end
	end
end)

player.PlayerService.PlayerTeam.changed:connect(function(val)
	wait()
	if val == BrickColor.new("White") then
		for _, v in pairs(game.Players:GetChildren()) do
			if v.Name == player.Name then
				wait()
			elseif v:IsA'Player' then
				for p, t in pairs (v.Character:GetChildren()) do
					if t:IsA'Part' then
					t.Transparency = 1
					elseif t:IsA'Hat' then
						t.Handle.Transparency = 1
						v.Head.Face.Transparency = 1
					end
				end
			end
		end
	end
end)

player.PlayerService.PlayerTeam.changed:connect(function(val)
	wait()
	if val == BrickColor.new("Bright red") then
		for _, v in pairs(game.Players:GetChildren()) do
			if v.Name == player.Name then
				wait()
			elseif v:IsA'Player' then
				for p, t in pairs (v.Character:GetChildren()) do
					if t:IsA'Part' then
					t.Transparency = 0.75
					t.BrickColor = BrickColor.new("Bright red")
					elseif t:IsA'Hat' then
						t:Destroy()
						v.Head.Face.Transparency = 0.75
					end
				end
			end
		end
	end
end)	
					
player.PlayerService.PlayerTeam.changed:connect(function(val)
	if val == BrickColor.new("Medium stone grey") then
		for _, v in pairs(game.Players:GetChildren()) do
			if v.Name == player.Name then
				wait()
			elseif v:IsA'Player' then
				for p, t in pairs (v.Character:GetChildren()) do
					if t:IsA'Part' then
						t.Transparency = 0
					elseif t:IsA'Hat' then
						t.Handle.Transparency = 0
						v.Head.Face.Transparency = 1
					end
				end
			end
		end
	end
end)

I'm not going to guarantee this, but I think I spotted your issue.

if t:IsA'Part' then
t.Transparency = 1
elseif t:IsA'Hat' then
t.Handle.Transparency = 1
v.Head.Face.Transparency = 1
end

If I recall properly, I'm pretty sure that elseif will nullify if the first condition is correct, but don't quote me on this.

Basically, If the first "If" statement is viable, in this case, if t is a part, then it will run that and end the script, simple as that. However, if it isn't a part, then it will resort to the "elseif" statement, which is to see if t is a hat.

I'm pretty sure this is how if functions work, if I recall properly, but yet again, don't quote me on this.

Also, the correct format of those lines.

if t:IsA'Part' or t:IsA'Hat' then --this allows both to be checked at the same time
	if t:IsA'Part' then --if its a part then... (game will skip the function if not viable)
		t.Transparency = 1
	end

	if t:IsA'Hat' then --if its a hat then...
		t.Handle.Transparency = 1
		v.Head.Face.Transparency = 1
	end
end

The finalized (fixed) script:

local player = game.Players.LocalPlayer
local char = player.Character
wait()

for _, v in pairs(game.Players:GetChildren()) do
    if v.Name == player.Name then
        wait()
    elseif v:IsA'Player' then
        	for p, t in pairs (v.Character:GetChildren()) do
			if t:IsA'Part' or t:IsA'Hat' then
				if t:IsA'Part' then
				t.Transparency = 1
			end
			if t:IsA'Hat' then
				t.Handle.Transparency = 1
				v.Head.Face.Transparency = 1
			end
		end
        end
    end
end

game.Players.PlayerAdded:connect(function (newPlayer)
if player.PlayerService.PlayerTeam.Value == BrickColor.new("White") then
        for _, v in pairs(game.Players:GetChildren()) do
            if v.Name == player.Name then
                wait()
            elseif v:IsA'Player' then
                for p, t in pairs (v.Character:GetChildren()) do
			if t:IsA'Part' or t:IsA'Hat' then
				if t:IsA'Part' then
				t.Transparency = 1
			end
			if t:IsA'Hat' then
				t.Handle.Transparency = 1
				v.Head.Face.Transparency = 1
			end
		end
             end
            end
        end
    end
end)

player.PlayerService.PlayerTeam.changed:connect(function(val)
    wait()
    if val == BrickColor.new("White") then
        for _, v in pairs(game.Players:GetChildren()) do
            if v.Name == player.Name then
                wait()
            elseif v:IsA'Player' then
                for p, t in pairs (v.Character:GetChildren()) do
			if t:IsA'Part' or t:IsA'Hat' then
				if t:IsA'Part' then
				t.Transparency = 1
			end
			if t:IsA'Hat' then
				t.Handle.Transparency = 1
				v.Head.Face.Transparency = 1
			end
		end
             end
            end
        end
    end
end)

player.PlayerService.PlayerTeam.changed:connect(function(val)
    wait()
    if val == BrickColor.new("Bright red") then
        for _, v in pairs(game.Players:GetChildren()) do
            if v.Name == player.Name then
                wait()
            elseif v:IsA'Player' then
                for p, t in pairs (v.Character:GetChildren()) do
                    if t:IsA'Part' then
                    t.Transparency = 0.75
                    t.BrickColor = BrickColor.new("Bright red")
                    elseif t:IsA'Hat' then
                        t:Destroy()
                        v.Head.Face.Transparency = 0.75
                    end
                end
            end
        end
    end
end)    

player.PlayerService.PlayerTeam.changed:connect(function(val)
    if val == BrickColor.new("Medium stone grey") then
        for _, v in pairs(game.Players:GetChildren()) do
            if v.Name == player.Name then
                wait()
            elseif v:IsA'Player' then
                for p, t in pairs (v.Character:GetChildren()) do
  			if t:IsA'Part' or t:IsA'Hat' then
				if t:IsA'Part' then
				t.Transparency = 1
			end
			if t:IsA'Hat' then
				t.Handle.Transparency = 1
				v.Head.Face.Transparency = 1
			end
		end
             end
            end
        end
    end
end)

ALSO, line 59 to 78 I might have spotted a similar error, so if it still doesn't work try replacing those lines with the following code:

Original:

player.PlayerService.PlayerTeam.changed:connect(function(val)
    wait()
    if val == BrickColor.new("Bright red") then
        for _, v in pairs(game.Players:GetChildren()) do
            if v.Name == player.Name then
                wait()
            elseif v:IsA'Player' then
                for p, t in pairs (v.Character:GetChildren()) do
                    if t:IsA'Part' then
                    t.Transparency = 0.75
                    t.BrickColor = BrickColor.new("Bright red")
                    elseif t:IsA'Hat' then
                        t:Destroy()
                        v.Head.Face.Transparency = 0.75
                    end
                end
            end
        end
    end
end)   

Modified:

player.PlayerService.PlayerTeam.changed:connect(function(val)
    wait()
    if val == BrickColor.new("Bright red") then
        for _, v in pairs(game.Players:GetChildren()) do
            if v.Name == player.Name then
                wait()
            elseif v:IsA'Player' then
                for p, t in pairs (v.Character:GetChildren()) do
                    if t:IsA'Part' or t:IsA'Hat' then
			if t:IsA'Part' then
				t.Transparency = 0.75
				t.BrickColor = BrickColor.new("Bright red")
			end	
			if t:IsA'Hat' then
				t:Destroy()
				v.Head.Face.Transparency = 0.75
			end
                    end
                end
            end
        end
    end
end)   

PS: If you want to get the finalized code without all the #'s if you CTRL+C & CTRL+V'd it, just look at the source by highlighting the code and then pressing the button that has the white page and the <> signs.