So ive been experimenting with placement systems for about 1 month now. But i recently encountered this problem while making my own placement module.. The problem is that when you change the grid to anything higer than 2 it kinda wont stick to any blocks.. Here are two videos showcasing what i mean.

Grid size 2 https://www.youtube.com/watch?v=_5UMY9dOGhQ

Grid size 4 https://www.youtube.com/watch?v=W-wpUS9rwsU

Heres the code i use to calculate the cframe:

function CAL_CF(POS, SIZE) -- // POS is the raycast position and SIZE is the current blocks size
	return CFrame.new(
		math.floor(POS.X / SIZE + 0.5) * SIZE,
		math.floor(POS.Y / SIZE + 0.5) * SIZE,
		math.floor(POS.Z / SIZE + 0.5) * SIZE
	)
end

Positioning the block

function placement:Enable(Name)
	
	local Block = Blocks:FindFirstChild(Name):Clone()
	Block.Parent = self.PLR.Character
	OBJ = Block
	
	MOVE = M.Move:Connect(function()
		local POS, SUR = RAY({self.PLR.Character})
		
		if POS and SUR then
			local CF = CAL_CF(POS, self.SIZE)
			Block:SetPrimaryPartCFrame(CF + (SUR * (Block.PrimaryPart.Size * .5)))
		end
	end)
	
end

My block size is 4x4x4 if you need that.

Anonymous