https://communities.bentley.com/products/ram-staad/f/ram-staad-forum/240906/what-is-the-difference-between-a-region-and-a-surfaceIn multiple models, I am modeling concrete walls as surfaces in the physical model. Then at some point - I think when converting it to the analytical model - some of the surfaces changes to regions. The regions appear to have reduced input capabilitiesen-USTelligent Community 12https://communities.bentley.com/thread/750846?ContentTypeID=1Fri, 27 Jan 2023 08:32:52 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:3e54f05e-d862-4c13-8c10-704f76f980b3Modestas<p data-userway-s19-styled="true" data-text-align-feature-value="4">Surface is a planar, structural object specific to the physical model. Surfaces are meshed automatically by the program and imported into the Analytical Modeler as Plate Elements.</p> <p data-userway-s19-styled="true" data-text-align-feature-value="4">A surface region is a polygonal area of a surface which vary in material properties, thickness or loading.</p> <p data-userway-s19-styled="true" data-text-align-feature-value="4">Yes, due to hydrostatic pressure the regions on the surfaces could be created automatically to apply varying load on the specific parts of the surface.</p><div style="clear:both;"></div>