dark artifacts in rendered model

[cire792]

To clarify what theeth said, about the T or U (in your previous thread)

@theeth

I’d bet you have a non-manifold mesh. Smoothing cannot be done properly because normals are not continuous in that case.
That happens when you have T junctions between faces. Like if the faces making the bottom of the cup join with the sides in a T, where one side is the interior of the cup and the other is the exterior.
It’s best if the bottom is made to have a thickness, like a fat U shape.

Martin

So, here’s a picture to try and explain that,
The orange line, is what you should check for, a non-manifold mesh - faces connected on the inside.
I’ve made a rim before, as a T, like in the bottom section, but you should model things like that with a U shape.

Welcome to the forums btw.

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