is this about normals?

Hi all - I’m new to all this - I’ve spent the last several days with lots of tutorials and documentation - making decent progress - but this is killing me.

So basically I want to create a glass with something in it. I modeled the glass ok. When I was ready to proceed to the contents of the glass - I selected all the interior vertices of the glass and duplicated them. I then separated the vertices (from the glass) so that they would constitute their own object/mesh. My intention here was to have a shape that fit the inside of the glass exactly.

This new interior shape, under the shaded view - shows flat black on the outside - but shaded normally on the inside. I assumed that I just need to flip the normals - since the ‘outside’ of this shape was created from the inside of the glass shape. No amount of normal flipping does it though. It remains flat black on the outside, immune to any kind of shading.

I hope this makes sense - your help would be appreciated.

The shaded view isn’t the best the 3D world has seen, it slows down Blender too which is why I never use it.

Why not try rendering it and see if the problem is in the render.

oh geeze - I’m such an idiot. I was seeing in the render as well - but then it turned out that my light was at just such an angle that it left that shape in shadow. Sorry for taking up space here. I think I’ll add a second light to my default starting setup…