The reason I want Touch Interest is because I am making a script on which if you touch a part it will print out all of the parts touching it, so the way I made this was by using :GetTouchingParts() which will return a table which I can run through a in pairs loop to print all the parts, the problem is that the part that is being clicked has CanCollide to false so :GetTouchingParts() will always return an empty table which is not what I want, I read more about it and it said that It would do its thing if the part has Touch Interest? https://developer.roblox.com/en-us/api-reference/function/BasePart/GetTouchingParts Here is the script I used if you can spot any problems or make it more efficient. I have a MouseDetector inside the part and the script inside the Mouse Detector for more info.
script.Parent.MouseClick:Connect(function()
local TouchingParts = script.Parent.Parent:GetTouchingParts()
for i, v in pairs(TouchingParts) do
print(v.Name)
end
end)

1 comment
Well The Instance 'Touch Interest' can only be created when a Handle is inside a tool. After it is created, drag the Touch Interest To something else.