Hook modifier falloff not working In Blender's hook modifier, it looks like the falloff, which should behave like proportional edit in edit mode isn't working. None of the tutorials I have found online show how to make proportional edit work.
This is a vanilla blender problem. There is nothing distinct about this scene or edit mode that prevents it from working.
The steps of using the hook modifier are:
In object mode add a hook modifier to object.
Assign vertex groups you want to effect in the modifier
Create an empty and assign as the object to the hook modifier.
No change to the falloff or strength changes anything in Blender
This is version 2.91
Falloff of the influence of a Hook does work but it requires some unexpected setup; you need to Assign multiple verticies to the modifier in Edit mode rather than rely on the 'Vertex Group' to indicate the affectedvertices.
Hooking to a single vert will move just that vertex. However, in Edit mode you can also 'Assign' other vertices to the modifier - it is these 'assigned' vertices that are affected by the 'Falloff' of the modifier. A Radius of zero inicates 'no falloff' (so all vertices are affected equally). Therefore, the steps you require are to select and 'assign' the surrounding vertices and then increase the Radius and Type until the required effect is achieved. This is demonstrated in the following image :