Undesired sharp edges with smooth shading I'm trying to achieve smooth shading on a model with subsurface. It worked pretty well until recently, now smooth shading works only with edges under certain angle. I don't use the edge split modifier.

Edit mode:



Object mode:



Disabling the subsurface mod:



Joining another object with smooth edges:



You can have a look at my blender 2.8 project here
A big thank to @lemon, you saved me a whole bunch of hours. idk why this was checked, but now it works as before.

You can see by yourself.



The option is located there: