how to exclude a polygon from growing gridhow to exclude a polygon from growing gridhttps://dlt-acc.firelay.cloud/c/message_boards/find_thread?p_l_id=3231581&threadId=51085362026-05-15T15:08:38Z2026-05-15T15:08:38ZRE: how to exclude a polygon from growing gridali shahabihttps://dlt-acc.firelay.cloud/c/message_boards/find_message?p_l_id=3231581&messageId=51285382022-06-14T17:26:54Z2022-06-14T17:26:54ZDear Gabriel <br />Thank you very much for your help.ali shahabi2022-06-14T17:26:54ZRE: how to exclude a polygon from growing gridGabriel Ruizhttps://dlt-acc.firelay.cloud/c/message_boards/find_message?p_l_id=3231581&messageId=51188412022-06-09T15:04:39Z2022-06-09T15:04:38ZHi Ali,<br /><br />Using RGFGRID, once you have your polygon of boundaries and the island, you have to refine each one (Edit -> Polygons -> Refine (equidistant) or Refine (linear)), select both polygons and generate the unstructured grid with Operations -> Grow Grid from polygons. I did a video to show the steps.<br /><br />Regards.<br /><br />GabrielGabriel Ruiz2022-06-09T15:04:38Zhow to exclude a polygon from growing gridali shahabihttps://dlt-acc.firelay.cloud/c/message_boards/find_message?p_l_id=3231581&messageId=51085352022-06-04T05:28:24Z2022-06-04T05:28:23ZHi <br />I am a DHI-Mike user and I am new to the deft3D. I want to make a UGRID to model a lake with an island inside it. A polygon for the boundaries of the lake and a polygon inside it for the boundaries of the island. How can I exclude the interior polygon from grid generation?ali shahabi2022-06-04T05:28:23Z