slic3r issue

hi ,
i've got a big problem with my silc3r
it deforms my initial stl file and makes it ugly
have you ever had this error?
please, need help

How big is your STL object?
What version of Slic3r?
Have you checked the STL for errors?

Can you post the STL?

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Waitaki 3D Printer

that's from mesh errors

I agree with all of the above advice, but I would also add that you shouldn't rely on a single slicer. I have toolchains that work with either slic3r, skeinforge, or cura, and at times I have to go to all 3 before I find one that slices correctly. Even if you don't have an integrated toolchain for your less-frequently used slicers, you can still use them and just copy the files around manually. Slic3r handles about 95% of my slicing, but for those stubborn objects that show up once in a while, I go to skeinforge and more recently cura.

thanks for all, i changed the detail resolution in netfabb to solve the problem
now it slices right!