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Forum Archive › the black lines now mixed with white and grey . if i hide parts . flying particles all around. › Reply To: the black lines now mixed with white and grey . if i hide parts . flying particles all around.
That is indeed, like Omar says a visualisation of the Bevel Modifier.
I usually leave it off in Edit Mode (the left of those three buttons, like a square with four vertices), because I find it a visual distraction when modeling.