The SolO-VIM instrument will be a two-dimensional full-Stokes spectro-polarimeter which will provide diffraction-limited vector-magnetograms, Dopplergrams, and continuum images of the solar photosphere. The instrument's performance depends on various parameters such as aperture diameter, filter characteristics, spectral- line sampling, and orbital position. Here we compute Stokes profiles in realistic 3D MHD simulations. These synthetic data are then degraded to match the output ex- pected from the VIM instrument, and subsequently inverted using a Milne-Eddington atmosphere. We present parameter studies in order to set up minimum require- ments on limitations of VIM's capabilities.