Senscape is a QGIS plugin for modelling human landscape experience. It is based on QGIS Viewshed analysis module, and represents its adaptation to QGIS processing framework (which means it can be used in custom models and scripts).
Current version (0.1) is experimental and not yet fully tested.
Search for “Senscape” in QGIS plugin manager (make sure experimental plugins are allowed)
In Processing menu, under Options, allow Senscape provider