https://forums.autodesk.com/t5/infraworks-forum/surface-disapear/m-p/14120789#M25259 <P>You should keep both of them turned on.&nbsp;</P> Thu, 07 May 2026 15:45:32 GMT Todd_Rogers 2026-05-07T15:45:32Z https://forums.autodesk.com/t5/infraworks-forum/surface-disapear/m-p/14118263#M25258 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="namlt33_0-1778031608641.png" style="width: 400px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/1637973i528281F744A66C30/image-size/medium?v=v2&amp;px=400" role="button" title="namlt33_0-1778031608641.png" alt="namlt33_0-1778031608641.png" /></span></P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="namlt33_2-1778031626649.png" style="width: 400px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/1637975iABAF6E3CCE4659BF/image-size/medium?v=v2&amp;px=400" role="button" title="namlt33_2-1778031626649.png" alt="namlt33_2-1778031626649.png" /></span><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="namlt33_3-1778031651952.png" style="width: 400px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/1637976iE1812FE1C80E9461/image-size/medium?v=v2&amp;px=400" role="button" title="namlt33_3-1778031651952.png" alt="namlt33_3-1778031651952.png" /></span></P><P>the 1st picture showing Infarawork existed surface, the 2nd show my civil3d imported surface. As you can see, my surface is missing some are while the civl3d surface is completely fine. This issue happend with all of my model but i dont know how to fix it.</P> Wed, 06 May 2026 01:44:36 GMT https://forums.autodesk.com/t5/infraworks-forum/surface-disapear/m-p/14118263#M25258 namlt33 2026-05-06T01:44:36Z https://forums.autodesk.com/t5/infraworks-forum/surface-disapear/m-p/14120789#M25259 <P>You should keep both of them turned on.&nbsp;</P> Thu, 07 May 2026 15:45:32 GMT https://forums.autodesk.com/t5/infraworks-forum/surface-disapear/m-p/14120789#M25259 Todd_Rogers 2026-05-07T15:45:32Z https://forums.autodesk.com/t5/infraworks-forum/surface-disapear/m-p/14124589#M25267 <P>i had try to but still those are not display the BMTH are correctly. Recently i found that the coverages causing the same problem. One i drape an .shp file the surface get broken</P> Mon, 11 May 2026 09:44:22 GMT https://forums.autodesk.com/t5/infraworks-forum/surface-disapear/m-p/14124589#M25267 namlt33 2026-05-11T09:44:22Z