Deforming objects along the surface of other objects Hello I have made a chain model and I want to put some objects on it but objects must deform and cover up chain. it should be like this example


Thank you for your helps.
So one of the cool things about a torus-- which is what a chain link is-- is that it unwraps really nicely.  You seam it twice and it makes a perfect square.  And any tiling texture on that square will tile on the torus.
So what I might try here is to take that knowledge and create some displacement maps for my toruses.  You could build each link's stuff as a flat scene, then render to a height map, and apply that height map as displacement to your torus.  (UV mapping the individual elements would be a different matter though.)
Another option here is to use the Textools addon, which can create flattened versions of meshes.  It rips along UV seams and then creates a flattened shapekey.  From the flattened shapekey, you can surface deform other meshes, then unflatten.