RT Journal Article SR Electronic(1) A1 PEREYRA, V.YR 1992 T1 TWO‐POINT RAY TRACING IN GENERAL 3D MEDIA1 JF Geophysical Prospecting, VO 40 IS 3 SP 267 OP 287 DO https://doi.org/10.1111/j.1365-2478.1992.tb00375.x PB European Association of Geoscientists & Engineers, SN 1365-2478, AB Abstract The modelling of realistic 3D geology and wave‐propagation phenomena is an important aspect of exploration geophysics. Ongoing research on a new model representation in terms of strongly reflecting interfaces described by surface patches, and on two‐point (i.e. source‐receiver) non‐zero‐offset ray tracing in such models, is presented. Examples are used to demonstrate how this model representation facilitates the description of geological unconformities such as pinched‐out layers, overhangs and reverse faults. Neither pseudo‐layers, nor ‘transparent’ or zero‐impedance extensions are needed for surfaces that do not naturally cover the geological window under study. These are therefore no longer layered models and consequently they require new ray‐tracing techniques which are described and exemplified., UL https://www.earthdoc.org/content/journals/10.1111/j.1365-2478.1992.tb00375.x