I followed this tutorial:
about lattice rigging a 2D arm. I followed the steps, but had to stop because pose mode the bones didn’t bend or distort the arm. Looked at a tutorial I had used successfully for arms in the past, but it still didn’t work. I thought it was because the arm was an imported image plane, but I drew a circle with the pencil and that didn’t work. This one says grease arm, the other did not, but it was pretty much the same process.
The steps are:
Armature, lattice surrounding it and the arm.
Armature modifier on the lattice
Make two vertex groups and assign them. I tried the dropdown list and the eyedropper.
Gave the arm a lattice modifier
I’ve done this before, I don’t know what the problem is.