check the hardness of the edges
display > polygons > soft/hard edges
experiment toggling the edges of the face between hard and soft
or it could (but quite unlikely) be from intersecting geometry
that's a "Ch" pronounced as a "K"
Computer skills I should have:
Objective C, C#, Java, MEL. Python, C++, XML, JavaScript, XSLT, HTML, SQL, CSS, FXScript, Clips, SOAR, ActionScript, OpenGL, DirectX
Maya, XSI, Photoshop, AfterEffects, Motion, Illustrator, Flash, Swift3D