https://forums.autodesk.com/t5/autocad-forum/how-can-i-create-a-3d-channel-with-varying-height-and-width/m-p/11538947#M47946 <P>hello guys</P><P>I am new at AutoCAD, so I've got a question. I want to model an open channel which its height is descending and the width of it widens from upstream to downstream.</P><P>I will attach the top view and front view.</P><P>can anyone help me with this?</P><P>I want a solid to export as a stl file to work with Flow3D.</P><P>thank you all.</P> Tue, 08 Nov 2022 16:35:47 GMT Elahotahari 2022-11-08T16:35:47Z https://forums.autodesk.com/t5/autocad-forum/how-can-i-create-a-3d-channel-with-varying-height-and-width/m-p/11538947#M47946 <P>hello guys</P><P>I am new at AutoCAD, so I've got a question. I want to model an open channel which its height is descending and the width of it widens from upstream to downstream.</P><P>I will attach the top view and front view.</P><P>can anyone help me with this?</P><P>I want a solid to export as a stl file to work with Flow3D.</P><P>thank you all.</P> Tue, 08 Nov 2022 16:35:47 GMT https://forums.autodesk.com/t5/autocad-forum/how-can-i-create-a-3d-channel-with-varying-height-and-width/m-p/11538947#M47946 Elahotahari 2022-11-08T16:35:47Z https://forums.autodesk.com/t5/autocad-forum/how-can-i-create-a-3d-channel-with-varying-height-and-width/m-p/11539376#M47947 <P><a href="https://forums.autodesk.com/t5/user/viewprofilepage/user-id/13135619">@Elahotahari</a>&nbsp;</P><P>- Draw both your 2d shapes using a closed polyline</P><P>- Extrude both your shapes to the correct 3rd dimension</P><P>- Rotated3d one you your shapes and correctly place it intersecting the other shape</P><P>- Use the intersect to merge both 3d shapes into 1 shape</P><P>- Use the solidedit command, to shell out your 3d in to create your open channel</P><P>&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="03.png" style="width: 999px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/1137537i355339C17BB927DC/image-size/large?v=v2&amp;px=999" role="button" title="03.png" alt="03.png" /></span>&nbsp;</P> Tue, 08 Nov 2022 19:37:55 GMT https://forums.autodesk.com/t5/autocad-forum/how-can-i-create-a-3d-channel-with-varying-height-and-width/m-p/11539376#M47947 dany_rochefort 2022-11-08T19:37:55Z https://forums.autodesk.com/t5/autocad-forum/how-can-i-create-a-3d-channel-with-varying-height-and-width/m-p/11544410#M47948 thanks a lot, dany Thu, 10 Nov 2022 18:38:54 GMT https://forums.autodesk.com/t5/autocad-forum/how-can-i-create-a-3d-channel-with-varying-height-and-width/m-p/11544410#M47948 Elahotahari 2022-11-10T18:38:54Z