In addition to this, more research should be done on the more ergonomic design of the support provided (colors, transparency levels etc.). Visualization without markers can be used in order to avoid fill in the space with many markers. Instead, one can use the object itself as a means of recognition. The user has one object, on which he/she already works. Furthermore, in the direction of ergonomic design, certain adjustments should be applied to the visualized objects to prevent jitters and vibrations. Due to environmental issues and the quality of devices the recognition process of the markers is not always very robust, thus leading to minor position alterations in each frame. This makes the 3D models to shake, increasing user’s discomfort. For that reason, certain methods for the fine tuning of these alterations should be applied.