Strange small dark areas on the surface 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.

It seems, that recalculating normals solved the problem! Here's what it looked like after it.
This is most likely caused by incorrect normals. In order to correct this, go into edit mode, select all the faces, and click on Shading->Normals->Recalculate.