I've been getting these shading inconsistencies with sub surf mod regardless of the subdivisions value, and "Smooth Vertex" deforms my shape undesirably. how do I go about fixing this?
This is how it looks in Edit mode:
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Blake Angelo
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Seems like a problem with your topology. Can you add more pictures in EDIT mode? or even better, a .blend file? – Cos Dim Feb 13 '17 at 19:57
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@CosDim I edited the question – Blake Angelo Feb 13 '17 at 20:09
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Most likely either wrong normals orientation or custom split normals. – Mr Zak Feb 13 '17 at 20:18
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@MrZak I checked the normals they're good - I'm going to check your second – Blake Angelo Feb 13 '17 at 20:48
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Seems like your topology is the culprit. Subdivison modifier tends to not work well with triangles like the ones you have. Try using only quads (squares). Other than that, I think your normals are flipped. Try this: Hit "T" to bring up the left hand panel on the viewport. Then go into EDIT mode and find the "Shading/UVs" tab. There scroll down and click "Flip Direction". Hope this helps.
Cos Dim
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The topology was the problem indeed - using quads only seemed to fix the problem quite nicely – Blake Angelo Feb 13 '17 at 22:05