Revolve - Invalid Face The selected faces are not valid revolve faces. Not all nonplanar faces are valid revolve faces. Only cylindrical, conical, toroidal, and spherical faces are valid boss or cut revolve faces. Parent topicRevolves Revolve - Planar Face Revolve - Faces Do Not Form Revolve Revolve - No Common Axis Revolve - Might Be a Boss Revolve - Might Be a Cut