How could I make a slide that goes downhill?

[dthecoolest]

If you are using a physics solution with no humanoids.

You can turn your character into a invisible sphere and apply a force to it, it will automatically roll downwards due to the normal force and gravity.

Thats what EgoMoose and X_O has done for their sliding system:

[Release] Platformer character controller

I made a character controller that allows for a style of movement you would typically find in 3D platformer style games. It works with both keyboards and controllers and could easily be extended to mobile with a little extra work. I decided to release this to give those interested in making a game like this an idea of one way to put this together. Move Set Double jump: (Press jump twice) [2018-10-30_14-57-43] High jump: (Crouch and jump while not moving) [2018-10-30_14-57-56] Long jump: (C…

If you are looking for a direction to manually simulate physics:

Sliding with Raycasting?

You can get the horizontal XZ component of the normal vector which is the direction to slide down. RayPart.CFrame = CFrame.new(RayCast.Position + Vector3.new(0,6,0)) local normalHorizontalComponent = RayCast.Normal*Vector3.new(1,0,1) if normalHorizontalComponent .Magnitude > 0.001 then RayPart.CFrame += normalHorizontalComponent.Unit * 0.1 end

You can cross product it as well:

Aligning player to normal vector of the ground

If you want to get the CFrame pointing downards of a slope you can use cross product. However keep in mind this only works if the slope is uneven and not perfectly flat or else the cross product will fail. local char = script.Parent local HRP = char:WaitForChild("HumanoidRootPart") local part =Instance.new("Part") part.Anchored = true part.Size = Vector3.new(2,1,5) part.CanCollide = false part.Parent = workspace part.FrontSurface = Enum.SurfaceType.Motor local downVector = -Vect…