I'm sorry to tell you this, but this guy Frost_47 ( steamcommunity.com/profiles/76…
), is stealing some of your artworks and uploading them on Steam community without permission, without giving credits and misleading all his "friends" making them believe that he is the author.
When I asked him what software is using to make these artworks, he deleted my comment. When I asked him why deleted my comment, he did it again on my second comment. When I asked him via Steam chat why is doing this, got disconnected without a reply. One day later, he uploaded other picture from other deviantart user. So I posted in the comments the link to the original author and, obviously, this guy deleted my comment and blocked me.
He has more than 200 stolen artworks in his account. If you want submit a claim of copyright infringement, follow this link: steamcommunity.com/dmca/create