Radiation patterns of point sources situated close to the Earth's surface are discussed. The medium in the vicinity of the Earth's surface is either locally homogeneous, or contains a thin surficial low-velocity layer. The main attention is devoted to point sources of explosive type and to single force point sources. Both horizontal and vertical single forces are considered. A general computer program designed for the computation of radiation patterns of point sources situated on the boundaries of thin transition layer is described. It is based on the hybrid ray-reflectivity method.