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So recently, I have been noticing neon light blue lines on objects I import, in place of the the normal orange selection lines. Maybe I was supposed to be getting this variant of line before hand or maybe I just somehow haven't noticed it till now. But assumptions aside, I'm wondering what this line is for and how can I get rid of the light blue lines? Also Along with this my objects that are imported seem to have their faces turn from gray to white.

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this means in Shading/UVs those edges have been marked Sharp.

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See docs http://www.blender.org/manual/modeling/meshes/editing/edges.html

As for clearing the Sharp Edges, that's done here:

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But this UI doesn't appear to be supremely intuitive (October 2015). it seems you have to click Sharp first before that panel becomes visible.

Here's a script that lets you

  • mark selected edges as sharp
  • or remove sharp status of a set of selected edges

code for Object Mode:

import bpy

obj = bpy.data.objects['Cube']
for e in obj.data.edges:
    if e.select:
        # invert current state
        e.use_edge_sharp = (not e.use_edge_sharp)
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Select all edges and press Crtl + E Clear Sharp and Mark Sharp are under Mark/Clear Seam.

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