Mesh is needed to be created in order to art layer be deformed.

Mesh doesn't need to warp all art layer, it's only need to be on where deform will be made.
Default mesh is a simple rectangle on art layer size.
To copy mesh from one art layer to another, click on art layer that you want to copy to, then drag other art layer you want copy from to edit mesh, that now will be named as copy mesh. After dropping, it'll open edit mesh mode so you can edit copied mesh as you like.

Click here to check more about deform.

• Select: Left Mouse
• Create: Ctrl+Left Mouse

• Select: Left Mouse

• Drag to define 2×2 mesh:Left Mouse
• Add/remove key points to axes: Left Mouse
• Change key pont position in the axis: Left Mouse

Flip mesh horizontally

Flip mesh vertically

Mirror all steps from one half to another half, separating half to right part and left part

Mirror all steps from one half to another half, separating half to upper part and lower part

Triangulation Options

Normal parts, Detailed mesh, Large parts, Small parts, Thin and minimum parts, Preserve edges.

• Details.
  • Sampling rate
  • Mask threshold
  • Distance between vertices
    • Minimum
    • Maximum
  • Scales
    • Specifying scalling factor to apply for contours. If multiple scales are specified, vertices are populated per scale factors.

• External mesh vertices need to be placed at outer of art layer, so mesh can deform that art form
• More vertices = more detailed deforms. If you want more clean and less low polygon like deform effect, you need to add vertices. (Put as many as you feel that it's needed)
• Try to make mesh in a way that very far vertices aren't conected, because it may affect deform in a way you don't like (it can make thin strange deform, that look like a scratch)
• If you have mirrored art layers that are same form. It's better to copy mesh one mesh to another (saves work time and it's more easy to work when editing parameter)