Certain vertices and edges are discolored (2.79b)
11111
Strange black shading. Cannot fully light mesh. (Cycles)
60081
Using opacity in TikZ causes strange rendering in Acrobat.
101815
color faces with wrong normals
25627
Bad Shading on Imported Mesh
37831
Colored borders around windows after update
12710
Weird line in my mirrored mesh
154227
Cause of Alpha or Black Artefacts in Render
95570
I can't color some parts of my model
124528
TikZ 3.0.0 (release) produces strange shadings if used with XeLaTeX and standalone
33956
Strange shading on model
60688
What is an efficient way to remove loose vertices?
116466
InDesign: poor rendering of gradient
58599
Looks to be an obscure page rendering problem
153566
Why subdivided faces with smooth shading acting weird?
39118
Weird sharp vertices with subdivision modifier
44379
Aliased edge around light source in cycles
27501
Show unselected vertices in UV/Image editor?