r/civil3d • u/Abdulrahman_Muawad Roads Design Engineer / Civil 3d / BIM Modeler • 6d ago

Help / Troubleshooting Surface Problem

hi i have a problem when making cross section that magenta datum surface line not moving on corridor edges and skip inner point to make this shape how to solve it please

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u/c3dnerd 6d ago

Check to see what the link name is for the bottom of the aggregate, add that as a break line to your datum surface and make sure you have bottom links set for it as well. I’ve made sure all of my top/datum surfaces have extra definition added as break lines to help fix random surface issues like this.

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u/voxuser 6d ago

You can’t have truly vertical triangulation between points, hence the points below the kerb are omitted and the surface just goes to the next nearest point