Rotate object vertically dependent on mouse target

[astraIboy (The Batman)]

How to Use Normal Vector to Align Part to Ramp

The responses in this thread are incorrect. The surface normal is essentially a vector that points directly away from the surface. One easy way of using this data is CFrame.new(part_pos, part_pos + normal). This will cause the object to ‘look at’ the surface normal, thus “aligned” with it. You can simply rotate this CFrame to orient it in whichever way you want relative to the surface. Refer to thread: Explanation of Surface Normal?