Envelope Construction Mode Warning
 
 
 

If you're in a construction mode other than Animation, you will get this warning when you try to set an envelope on a deforming object.

If this is the case, which is less typical, you are using the envelope's deformations to sculpt the geometry and do not intend to animate the envelope.

If this is the case, which is less typical, you are using the envelope's deformations to create shape keys and do not intend to animate the envelope. The Envelope operator will be deleted when you save or apply shape keys (create shape clips in the mixer) unless you first mute it. To do this, you can choose the Deform > Save Shape Key command.

For more information about construction modes, see Construction Modes and Regions [Modeling and Deformation Basics].