The Lattice modifier deforms the base object according to the shape of a Lattice object. Objects to be deformed can be meshes, curves, surfaces, text, lattices and even particles.
A Lattice modifier can quickly be added to selected objects by parenting them using the Lattice Deform option.
The Lattice object with which to deform the base object.
- Vertex Group
An optional vertex group name which lets you limit the modifier's effect to a part of the base mesh.
A factor to control blending between original and deformed vertex positions.
Why would you use a lattice to deform a mesh instead of deforming the mesh itself in Edit Mode? There are a couple of reasons for that:
If your object has a large number of vertices, it would be difficult to edit portions of it quickly in Edit Mode. Using a lattice will allow you to deform large portions efficiently.
The smooth deformation you get from a Lattice modifier can be hard to achieve manually.
Multiple objects can use the same lattice, thus allowing you to edit multiple objects at once.
Like all modifiers, it is non-destructive. Meaning all changes happen on top of the original geometry, which you can still go back to and edit without affecting the deformation.
A lattice does not affect the texture coordinates of a mesh's surface.
When using a lattice to deform particles, order in the modifier stack matters. You need to place the Lattice modifier after the Particle System one.