How to set collision of a part?

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1

How to fix the problem below:

  1. The object that is following my cursor is halfway through the objects. It has a very small collision hitbox.
  2. The object goes near the camera when equipped.

Here is the code relevant to this.

local RunService = game:GetService("RunService")
local Player = game.Players.LocalPlayer
local Character = Player.Character or Player.CharacterAdded:Wait()
local mouse = Player:GetMouse()

-- Variables
local ghostConnection
local ghost

Character.ChildAdded:Connect(function(child)
	if not child:isA("Tool") then return end
	if not child:FindFirstChild("ConstructPart") then return end
	
	local tempFolder = workspace:FindFirstChild(Player.UserId .. "_TEMP")
	ghost = child.Handle:Clone()
	ghost.Name = "GhostObject"
	ghost.Parent = tempFolder	
	
	ghostConnection = RunService.RenderStepped:Connect(function()
		if mouse.move then
			ghost.Orientation = Vector3.new(0, 0, 0)
			ghost.Position = mouse.Hit.p
		end
	end)
end)

Character.ChildRemoved:Connect(function(child)
	ghost:Destroy()
	ghostConnection:Disconnect()
end)

Sample Video:

2

i dont have any idea on an easier way to do this, but when setting the position of the block, i guess you could blockcast (raycast in shape of a cube, workspace:Blockcast) and using RayParams to move it at the position of the result

3

You can use mouse.TargetFilter to have an instance and its descendants to be ignored while calculating mouse.Hit and mouse.Target to fix the second problem.
See here: