Face Draft
Face draft enhancements allow you to control which part of the model thickness is preserved.
![](https://help.autodesk.com/cloudhelp/2018/ENU/InventorLT-WhatsNew/images/GUID-B4E677FD-A240-499A-9D5F-C07A1353D1BE.png)
Ruled Surface
The Ruled Surface command is added to create Normal, Tangent, or Sweep surfaces. Ruled surfaces are used to create pockets, split a complex body after shelling, or to create a parting surface for mold design.
![](https://help.autodesk.com/cloudhelp/2018/ENU/InventorLT-WhatsNew/images/GUID-80EB4644-2354-4679-92A2-93165DDCC27B.png)
Silhouette Curve
New exclude options are added to the Silhouette Curve command to provide greater control of curve generation.
![](https://help.autodesk.com/cloudhelp/2018/ENU/InventorLT-WhatsNew/images/GUID-06E61498-B005-4EF5-ADA8-2CAEEE2F8683.png)
Replace Face
Replace Face supports both surface and solid faces as replacement faces.
![](https://help.autodesk.com/cloudhelp/2018/ENU/InventorLT-WhatsNew/images/GUID-947F5A16-C6E9-4B90-B07D-6232E64852BB.png)
Direct Edit
![](https://help.autodesk.com/cloudhelp/2018/ENU/InventorLT-WhatsNew/images/GUID-670ACE78-FF98-4A83-89E9-16191023840E.png)
General Design
- The Mirror and Rectangular Pattern commands now support selecting multiple solid bodies. Use these new options to create new bodies or join the bodies.
- The Measure command now allows you to measure an angle to the midpoint of any segment. This option is achieved by hovering your mouse over the midpoint of a segment until a yellow dot appears.
- You can now use the Rectangular Pattern command to create nonlinear solid body patterns.
Enhancements to Boundary Patch
The Boundary Patch command no longer requires the input edges to form a closed loop(s) to preview and create a patch.
The Boundary Patch command now tries to create a patch whenever it is possible. If the input edges do not form a closed loop, it creates a patch that is large enough to encompass all input edges. It is no longer necessary for the boundary of the open loop patch to correspond to input edges.
The user interface is unchanged. You can still specify continuity constraints (G1/G2) and tangent scale values for each input edge. The OK and Apply buttons are enabled when it is possible to create a patch from input edges. You do not need to specify whether an open or closed loop patch is created. The Boundary Patch command automatically determines what to create.
If feature preview is enabled, the preview gets updated every time when you select or deselect an edge as shown in the following images going from left to right: 1) One edge is selected, 2) A second edge is added, 3) A third edge is added and a closed loop is formed.