  We present GSDeformer, a method that achieves free-form deformation on 3D
Gaussian Splatting(3DGS) without requiring any architectural changes. Our
method extends cage-based deformation, a traditional mesh deformation method,
to 3DGS. This is done by converting 3DGS into a novel proxy point cloud
representation, where its deformation can be used to infer the transformations
to apply on the 3D gaussians making up 3DGS. We also propose an automatic cage
construction algorithm for 3DGS to minimize manual work. Our method does not
modify the underlying architecture of 3DGS. Therefore, any existing trained
vanilla 3DGS can be easily edited by our method. We compare the deformation
capability of our method against other existing methods, demonstrating the ease
of use and comparable quality of our method, despite being more direct and thus
easier to integrate with other concurrent developments on 3DGS.
