https://forums.autodesk.com/t5/maya-modeling-forum/anyone-else-suffering-this-bug/m-p/5486504#M25586 <P>xanderland,</P> <P>I have received your scene file. thanx.</P> <P>&nbsp;</P> <P>wreliford,&nbsp;</P> <P>I have one scene file which should suffice for now.</P> <P>&nbsp;</P> <P>I would however like to ask a few questions.</P> <P>&nbsp;</P> <P>1. Are you guys working (either intentionally or accidentally) with instances when duplicating geometry that may have per-component (face) shading assignments?</P> <P>2. when you apply materials do you apply them at the shader level or SG level?</P> <P>3. How are materials applied? Drag and drop SG or shader from Hypershade onto object? Right click and Assign Shader? Right click and Assign to Selected Object Marking Menu. etc...</P> <P>4. Does this occur while working or does it appear when a scene has been opened?</P> <P>5. Is anyone importing objects from a referenced file that may or may not have had shader based reference edits applied to it?</P> <P>6. Is the geo interop'ed in from another source (fbx import, obj import, etc..)?</P> <P>7. What kind of modeling operations are being performed? Combine, Separate, etc...?</P> <P>8. Specifically what version of Maya are you using?</P> <P>&nbsp;</P> <P>Anything you can tell me about the specific workflow utilized when this issue occurs would be helpful. The more detailed the better.&nbsp;</P> <P>&nbsp;</P> <P>tnx.</P> Wed, 28 Jan 2015 18:19:29 GMT syracoj 2015-01-28T18:19:29Z