Need Help shading a cube/flat surfaces

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  06 June 2013
Question Need Help shading a cube/flat surfaces

Hello everyone!

It's me trying to learn about shading (it's my bane, even more than perspective !)

I am having trouble understanding how to shade cubes. I know each side represents a value:

But I am having trouble understanding the gradation of each plane of the side of the cube relative to a light source.

For example this image looks "right" but seems to be contradicting the light source:

it seems that the light is hitting directly the top vertex and logic would tell me that each side (left and right) would be lit from the top and darker from the bottom

You can see what I mean with my confusion here:

Shouldn't all the corners touching the green dot be either "light" or "dark"?

I would love some help undersating this concept of shading flat surfaces. Becuase I am super confused.

  06 June 2013
Reversed Vertex normals?
  06 June 2013
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