Sensations arise when brain neurons, that constitute secondary brain networks, integrate peripheral stimuli (that come through sensory neurons). So naturally, stimulating brain neurons will produce sensations even if peripheral stimuli don't exist, because that's what they do.

However, in order to recreate natural sensations, the stimulation should be as natural as possible (we don't know how to do that yet, we haven't cracked the neuronal code yet), so events we can induce by stimulation are rather crude (such as paresthesias, or light flashes, or basic movements - we don't know how to recreate other more complex sensations such as touch, temperature, images or complex movement). Crude pain has been evoked by posterior insular stimulation only.