I have this same issue since I got access to Beta Grid Sept 2016. I appear grey to myself but everyone else see's me as a cloud. If I go in to edit outfit my skin will show up but only locally and not to others. My skin does not show and alpha layers worn have no effect. I have reset my avi and default "ruthed" version of me has the same issues. Ive ctrl alt r to rebake myself many times. I've tried both SL Viewer and Firestorm. I've changed outfits and skins, I even made my own basic skin. I've reset my router and have gone to the extents of having my IP address changed and modem/router completely reset and reconfigured. I've opened up the debug console and also that debug setting that puts the hovertext over your head to show COF version. Where the COF is displayed above my head it should show something like [UUUU] but mine shows [-----]. Debug console displays warning messages about http 502 bad gateway. Also seen a message fly across the screen about COF Version mismatch one time. I've attempted every troubleshooting thing I could find about the issue and nothing seems to fix it. Ran through Firestorms bake fail page. Read through all the JIRA's on the subject. There seems to be no solution. Some of the newer items Ive purchased like some stacks of books and plants, the folders in my inventory are empty. So its like my inventory isn't synced correctly.