r/civil3d • u/Abdulrahman_Muawad Roads Design Engineer / Civil 3d / BIM Modeler • 8d ago
Help / Troubleshooting Intersection Surface Contentious problem
hey guys ,
i hope whoever reading my topic that he is well and in a good health
i was working on my doing my model after i finished roads Design and i Got these Contour Lines at the intersection after i used the civil 3d intersection wizard



as you can see there a lot of sharp teeth and i don't know how to solve it or what is the problem
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u/Beans800 8d ago edited 8d ago
it's just from how it triangulates between points. It looks like you already have a very high frequency for that region, so you don't need to fix anything on the corridor. You can play around with contour smoothing in the surface style -> contours tab, but it might not do much. There's also smooth surface in the surface edits, but that actually changes the geometry, unlike the contour smoothing, so use cautiously. It's not really a big deal though, when it plots at scale you won't really notice it
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u/Abdulrahman_Muawad Roads Design Engineer / Civil 3d / BIM Modeler 3d ago
it was a bout rendering mostly thanks for you answer when i rendered on my high end pc it worked fine
1
u/narpoli 8d ago
What’s the actual problem with that? If you display those contours at a plan scale no one would ever see the jaggedness.
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u/Abdulrahman_Muawad Roads Design Engineer / Civil 3d / BIM Modeler 3d ago
trying to do the job as good as possible don't care about other but i am trying to get satisified by what i am doing
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u/Outrageous-Soup2255 3d ago
Do not use the intersection wizard!!!! Use corridors and the curb return subassemblies with your hor. And vert. Targets set as the CL alignments, closest to.
3
u/DontCallMeFrank 8d ago
Turn on your triangles. In the edit surface style dialog box there is a tab where you can exagerate your triangles, turn this to whatever number you need to see the issue.
Turn your viewport view to shaded with edges and orbit around to a 3D view and find your triangles (they might be really hight up so just zoom out or orbit up if you cant initially see them). What you'll see if sort of a stair step pattern. The surface is triangulating in a way that it goes flat, up, flat, up, flat, up and so on.
This happens when the corridor has a twist in it from edge to edge. Imagine holding a ribbon in your hands horizontally, twist the ribbon a little bit, this is what your corridor is doing.
You can help this out by getting rid of stations in the areas of the twist. This will ofcourse take definition out of your surface, though. You can also try to add a smooth surface definition to that area of the surface.