Raycast selection?

Help and Feedback Scripting Support
#1

I’m attempting to create a selection tool using Raycast to determine whether or not a Part is selected:

Mouse.Button1Down:Connect(function()
	local Target = API.Raycast(Camera.CFrame.p, Mouse.Hit.p)
	if Target ~= nil then
		print("Yes")
	else
		print("No")
	end
end)

--||--||--||--

API.Raycast = function(Origin, Direction)
	local raycastParams = RaycastParams.new()
	raycastParams.FilterDescendantsInstances = {TriTerrain}
	raycastParams.FilterType = Enum.RaycastFilterType.Whitelist
	
	local raycastResult = game:GetService("Workspace"):Raycast(Origin, Direction, raycastParams)
	if raycastResult then
		if raycastResult.Instance ~= nil then
			return raycastResult.Instance
		end
	end
end

The reason I’m doing this is so that the Mouse ignores any obstructions in the way and selects what is needed -
However, this doesn’t seem to work as the Mouse.Hit.p is stopping wherever the obstruction is.

How can I work around this or extend the direction of the Ray to bypass the obstruction and register the part?

#3 
API.Raycast(Camera.CFrame.p, Mouse.Hit.p)

Isn’t the second parameter supposed to be the direction? In that case, try

API.Raycast(Camera.CFrame.p, Mouse.Hit.p - Camera.CFrame.p)

or

API.Raycast(Camera.CFrame.p, Mouse.UnitRay.Direction * 5000)
#4

TargetFilter only allows for one instance at a time; using Raycast, I can whitelist all the areas actually required and work from that.