Regard3D is an open-source software application designed for photogrammetry, which is the process of creating 3D models from photographs. It transforms a series of conventional 2D images into three-dimensional digital models through a sequence of automated and manual steps. Suitable for hobbyists and professionals, Regard3D provides an accessible platform for users to develop 3D models by utilizing the latest photogrammetric techniques. It runs on multiple operating systems, including Windows, macOS, and Linux. Detailed guides and support are available on its official website, http://www.regard3d.org/, to assist users in navigating the software's features.