https://forums.autodesk.com/t5/3ds-max-modeling-forum/modelling-a-roller-coaster-on-revit-in-the-massing-environment/m-p/7615482#M12400 <P>Are&nbsp;you trying to model the tracks in 3ds Max or Revit?&nbsp; If 3ds Max can you post a picture of the tracks?&nbsp; I would start by creating a spline that define the path of the track and another spline of the track's cross section.&nbsp; You can then use Create, Geometry, Compound Objects to extrude the shape along the spline.</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="rail1.JPG" style="width: 694px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/437855i0E644BFE1A05EC2E/image-size/large?v=v2&amp;px=999" role="button" title="rail1.JPG" alt="rail1.JPG" /></span></P> <P>&nbsp;</P> <P>If you are using Revit I suggest you post the question in the Revit forum.</P> <P>&nbsp;</P> Tue, 12 Dec 2017 02:34:03 GMT leeminardi 2017-12-12T02:34:03Z https://forums.autodesk.com/t5/3ds-max-modeling-forum/modelling-a-roller-coaster-on-revit-in-the-massing-environment/m-p/7614057#M12399 I'm having issues modelling the roller coaster tracks any contribution will be highly appreciated Mon, 11 Dec 2017 16:15:05 GMT https://forums.autodesk.com/t5/3ds-max-modeling-forum/modelling-a-roller-coaster-on-revit-in-the-massing-environment/m-p/7614057#M12399 Anonymous 2017-12-11T16:15:05Z https://forums.autodesk.com/t5/3ds-max-modeling-forum/modelling-a-roller-coaster-on-revit-in-the-massing-environment/m-p/7615482#M12400 <P>Are&nbsp;you trying to model the tracks in 3ds Max or Revit?&nbsp; If 3ds Max can you post a picture of the tracks?&nbsp; I would start by creating a spline that define the path of the track and another spline of the track's cross section.&nbsp; You can then use Create, Geometry, Compound Objects to extrude the shape along the spline.</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="rail1.JPG" style="width: 694px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/437855i0E644BFE1A05EC2E/image-size/large?v=v2&amp;px=999" role="button" title="rail1.JPG" alt="rail1.JPG" /></span></P> <P>&nbsp;</P> <P>If you are using Revit I suggest you post the question in the Revit forum.</P> <P>&nbsp;</P> Tue, 12 Dec 2017 02:34:03 GMT https://forums.autodesk.com/t5/3ds-max-modeling-forum/modelling-a-roller-coaster-on-revit-in-the-massing-environment/m-p/7615482#M12400 leeminardi 2017-12-12T02:34:03Z