Yesterday's patch visually broke BuildMode FreeCam, causing buttons to appear distorted or green.
If you're using BuildCam, please re-download asap to fix that issue.
If you're not familiar, this mod adds the free-roaming camera mode to buildbuy mode, so you can just press Tab to enter it.
Usage is extremely simple - while in build mode, press TAB and you'll enter the freecam mode.
Open the zip and drag the "Tmex-BuildCam.package" to your mods folder.