"Flip" option in mirror modifier is only effective for when "Bisect" is enabled, thus grey out the flip option when it's ineffective to avoid confusion on the user interface. Pull Request: https://projects.blender.org/blender/blender/pulls/110191
"Flip" option in mirror modifier is only effective for when "Bisect" is enabled, thus grey out the flip option when it's ineffective to avoid confusion on the user interface. Pull Request: https://projects.blender.org/blender/blender/pulls/110191