Need a method for big projectile hit detection

Previously I used FastCast module for casting a large fireball but it doesn’t work as intended, since the module itself is created for small projectiles like bullets. So right now I am looking for better methods. I was using a module that creates a hitbox in where the projectile lands and it works perfectly so yeah my problem isn’t about the hitbox. It is about detecting where projectile lands or touches something. What can I use in this case? I have checked a lot of posts and saw some people suggesting GetPartsInPart and Raycast/Shapecast but I really don’t understand how I can use them in this case. Can someone explain please?

You could use the newly introduced shape methods.

But how? Don’t shape casts instantly arrive to their destination? How can I make it follow the projectile?

You could fire a short in length (a unit of 1 for example) each step

Alright so I did this but there are some flaws that I don’t know how I can fix.

remote.OnServerEvent:Connect(function(player, action, variable3)
	local character = player.Character
	local fireball = fireballRS:Clone()
	if action == "Z" then
		fireball.Parent = workspace
		fireball.CFrame = character.Head.CFrame
		local fireballBV ="BodyVelocity")
		fireballBV.MaxForce =,1e6,1e6)
		fireballBV.Velocity =, variable3).LookVector * 60 
		fireballBV.Parent = fireball
		local params =
		params.FilterType = Enum.RaycastFilterType.Exclude
		params.FilterDescendantsInstances = {player.Character}
		local direction = fireball.CFrame.LookVector * 10
		local hasHit = false
		while hasHit == false do
			local results = workspace:Blockcast(, blockCast.Size, direction, params)
			if results then
				hasHit = true
				local indicatorC = indicator:Clone()
				indicatorC.Parent = workspace
				indicatorC.CFrame =

I used blockcast for a dash move before but it was on player character so the lookvector worked well. But in this case when the player turns and shoots the fireball then the lookvector of it still stays the same as far as I understand. So as a result the hit indicator appears in ground behind the fireball. What should I do?