https://communities.bentley.com/products/road___site_design/f/geopak-inroads-mx-openroads-forum/224444/delete-triangles-in-a-complex-terrain-created-from-merged-surfacesHow do delete triangles in a complex terrain created from merged surfaces. The survey processing rules has been deactivated. I click on edit model to get the edit terrain model, click on delete triangles. I click on the terrain and it says that it isnen-USTelligent Community 12https://communities.bentley.com/thread/691064?ContentTypeID=1Tue, 11 Jan 2022 19:46:57 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:d002d8e0-ff7c-407b-a7a9-9e58cc04096cChris McNulty<p>Aaron,&nbsp;</p> <p>Did you try deactivating rules for the complex terrain model within the OpenRoads Model Tab?&nbsp;</p> <p><img src="/resized-image/__size/320x240/__key/communityserver-discussions-components-files/5922/pastedimage1641930480861v1.png" alt=" " /></p><div style="clear:both;"></div>