**4. Pictorial depth cues of an object on perceived heaviness: Virtual Vision + Virtual Haptics environment: Third experiment**

In Sec. 3.2, the Real Haptics + Virtual Vision environment ensured a strict manipulation of visual information independently from haptic information and suggested possibilities for presenting any type of visual/graphical stimulus with a range of intensities, unlike the Real Vision environment. Concerning vision, this suggested further study of visual components such as pictorial depth cues or stereopsis that may contribute to perceived object size and heaviness. For haptics, it suggested the development of a haptic display making possible the presentation of any type of haptic stimulus with a range of intensities. This led to the challenging experiment using a Virtual Haptic + Virtual Vision environment. Thus we demonstrate here an experiment using Virtual Vision + Virtual Haptics environment enabling us to address pictorial depth cues.
