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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: my surface

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. After recalculating normals

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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.

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  • $\begingroup$ Thank you, it seems, this solved the problem. I included image of the result in my first message. $\endgroup$ – Andrei Petrov Oct 10 '16 at 21:16
  • $\begingroup$ If this solved your problem, please accept / upvote the answer. I'm glad I could help. $\endgroup$ – Billy S Oct 10 '16 at 21:17
  • $\begingroup$ I accepted it, but upvoting doesn't work, because I have reputation less than 15... $\endgroup$ – Andrei Petrov Oct 10 '16 at 21:23
  • $\begingroup$ @AndreiPetrov - also be sure to hit "W" and then "A" in edit mode and select "Remove Doubles". $\endgroup$ – metaphor_set Oct 10 '16 at 21:51

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