*Last Words*

In this work, a temperature-depth cross modal mapping for conveying depth in the context of tactile artwork exploration for visually impaired people was designed. The mapping was based in a conceptual and intuitive correlation between temperature and depth. In addition, the developed mapping was applied to two di fferent types of contexts, a complete prototype for adding temperature interaction to paper relief artworks designed and developed, and that same prototype was tested both with sighted and visually impaired users to assess its functionality and the temperature-depth mapping algorithm performance. The results showed that a relationship between depth and temperature exists and that, on the basis of that relationship, depth of artwork features can be transmitted successfully through temperature cues during tactile exploration of an artwork. We hope this work can encourage researchers to consider thermal interaction both as a substitute for depth and as a viable way to improve accessibility for visually impaired people in tactile artwork exploration contexts.

**Author Contributions:** Conceptualization, J.D.C.; data curation, S.J.; formal analysis, J.I.B.; funding acquisition, J.D.C.; methodology, J.I.B. and L.C.Q.; project administration, J.D.C.; software, J.I.B. and G.C.; supervision, J.D.C.; validation, J.I.B., S.J., and G.C.; writing—original draft, J.I.B. and J.D.C.; writing—review & editing, J.I.B. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research was supported by the Science Technology and Humanity Converging Research Program of National Research Foundation of Korea (2018M3C1B6061353).

**Conflicts of Interest:** The authors declare no conflict of interest.
