Found some info reguarding hard and soft Normals that might help U understand what it does, if you don't allready know. I didn't know much about them till I found this.


Using the Soften/Harden option, you can specify an angle at which the polygonal object is to be smoothed when displayed in Smooth Shaded mode. Vertex normals are added if edges are hard or deleted if edges are soft.

If the angle between two faces is larger than the smoothing angle, the edge is hard. If the angle between two faces is smaller than the smoothing angle, the edge is soft.

To make edges soft or hard:

Use the options window to preset a smoothing angle. The angle value in the options window is the default value.

For example, if you want to render edges hard, you can preset the smoothing angle in the options window to 0 degrees. To render soft edges, preset the angle to 180 degrees.

1
Select an object whose edges you want to soften or harden.
2
Press F10 or press the right mouse button and select Edge from the marking menu.
3
Marquee-select the edges you want to change, or select individual edges.
4
Select Edit Polygons > Normals Soften/Harden.
The edges are modified based on the current settings in the options window.
5
If necessary, while the polygonal edges are selected, change the angle in the options window to soften or harden the edges you want and then click the Soft/Hard button.