I exported a plot of 3d surface from Maple to .x3d file, then used Meshlab to create from it a .stl file. And finally I tried to use "Solidify" tool of Blender to make the surface 0.02 thick. Here's what I got:
Is this normal view? I mean do a lot of small dark areas look normal, provided that the original surface is smooth? If not, then how can I correct it.