I have a plane to which I've added a subdivision modifier and a solidify modifier. All looks good if it's flat-shaded but it seems to curve towards the center if I set smooth shading:
I guess this is to do with normals (I'm a complete beginner when it comes to this aspect of things)?
The edges between the sides and the top and bottom are hard and sharp (which I want - I don't want a curved bevel-like effect).
But I want the top surface to remain looking flat until I start doing something with the displacement of the vertices of the faces introduced by the subdivision modifier.
This issue came up as I wanted to apply a noise texture to the surface - if I don't use the solidify modifier then I can get the effect I want (which requires smooth shading so that one doesn't see the hard edges between the faces introduced by the subdivision modifier). But then adding the solidify modifier means I get this odd curving effect towards the edges.
If I turn off smooth shading then I don't get this odd curving effect but then I start seeing the edges between the subdivision faces which I don't want either.
Any suggestions would be much appreciated.