About the Envelope Tool
NOTE If you use the Envelope tool on a textured brush stroke, it is will deform its texture to fit the new shape of the brush stroke. Keep in mind that this will resample the texture, which is liable to make it lose quality.
NOTE
You can also apply an animatable Envelope-like deformation on drawings or other elements in your scene using the Mesh Warp node—see Mesh Warp Node.
NOTE To learn more about the Envelope tool options, see Envelope Tool Properties.