https://forums.autodesk.com/t5/3ds-max-modeling-forum/3ds-max-car-modeling-problem-with-some-polygons-changing-to/m-p/5497698#M19507 <P>It looks like a problem with Smoothing Groups. &nbsp;Try selecting all of your polygons, and go to the Smoothing Groups rollout in the Modify tab. &nbsp;With everything selected, hit the Clear All button. &nbsp;That will get rid of the gradients and black faces.</P><P>&nbsp;</P><P>Smoothing groups work by assigning one or more&nbsp;numbers to a face. &nbsp;If the face shares the same number as an adjacent face, it will attempt to make the two faces appear smooth. &nbsp;If they do not have the same number, you will see a hard edge between them.</P> Fri, 06 Feb 2015 15:13:26 GMT CAMedeck 2015-02-06T15:13:26Z