CTRL+Z doesnt work in sometimes, for example when i do Align surface then i cant back it.Why this happens?

That sounds like your surface went behind the camera. When the surface tool comes too close to the front of your view, mocha experiences a calculation error and this can make it hard to undo because the program is experiencing a math error.

Make sure the surface isn’t tilting too much and try again.


actually when click the Align surface not surface “Grid 8X8” becomes on my whole view window