I've had this problem with mooseshit/koskit since alpha 2/3. It came when I changed all lightmap scales from 16 to 32. So I thought selecting the face and changing it back to 16 would fix problem, but no. It made it even worse. So I thought, meh, buggy brush, So I remade it from scratch, AND IT'S STILL THERE!!! :cursing: Here's how it looks in hammer. Any idea of how to fix this cursed brush?