Couldn't find this anywhere.
✓ ANSWER ACCEPTED
How to determine which side of a part mouse.hit lands on?
1 answer
✓ Accepted answer
Just use the property TargetSurface.
local player = game:GetService("Players"):GetPlayerFromCharacter(character)
local mouse = player:GetMouse()
print(mouse.TargetSurface.Name)
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1 comment
Damn it, where was this? Checked the API page 10 times.