Yes, the 3D automatic horizon tracking workflow can also be applied to 2D lines. 3D Geo-Models and Horizon Stacks can be generated from 2D lines interpretation.
In PaleoScan, the mis-tie corrections applied to 2D line is not static but variant, it is therefore not possible to define a specific 2D line as a reference for the correction. All the 2D lines move up or down in relation to one another, according to the marked horizons.
2D lines can be added to an existing 2D Model-Grid by right clicking on an existing 2D interpretation and selecting the Add 2D Line(s) option from the pull-down menu. This option is also available from the Model-Grid toolbar. The user will then need to run an Automatic Propagation in order to generate links between nodes on the added 2D lines.
On 2D Model-Grids, the Geo-Model preview is computed and displayed according to the marked horizons only. Therefore, the user first needs to mark at least two horizons before launching the preview.
Yes, it is possible. To do so the user needs to have generated a 2D Horizon Stack. They then need to use the 2D Horizon Stack Interpolation option to generate a 3D Horizon Stack. This option is available from the Horizon Stack toolbar, from the Project Browser context menu or from the 2D Horizon Stack context menu.
Finally, the 3D Geo-Model from Horizons tool, available from the Horizon toolbar can be used to generate the 3D Geo-Model, using the 2D interpolated Horizon Stack as an input.