3D Compositing with Action > Action: Surfaces > Modifying Surfaces >
Vertices Settings for Bicubic and Extended Bicubic Surfaces

For bicubic and extended bicubic surfaces, there are extra controls available in the Vertices tab.

(a) Subdivide button(b) Shape Channel button(c) Magnet Transformation box(d) Reference Point fields(e) Reset Selection box(f) 3D Handles button

Subdivide button
  Subdivides an extended bicubic surface into more sections. See Subdividing an Extended Bicubic.
Position X, Y, Z fields
  Move selected surface points along the X,Y or Z-axis. Hold down Ctrl and select surface points to position them.
Rotation X, Y, Z fields
  Rotate selected surface points along the X,Y, or Z-axis. Hold down Ctrl and select surface points to rotate them.
Scale X, Y, Z fields and Prop button
  Scale selected surface points along the X,Y, or Z-axis. Hold down Ctrl and select surface points to scale them. Enable Prop to scale surface points proportionally.
Magnet button
  Enable to transform selected vertices and tangents numerically. Use in conjunction with the Magnet Transformation box. See Transforming Multiple Points.
Magnet Transformation box
  Select the type of transformation to use when Magnet is enabled.
Home button
  Resets the postion of the magnet curve after panning.
Undo button
  Undoes a change to the Magnet Curve Editor.
Reset button
  Resets the Magnet Curve Editor.
Reference Point X, Y, Z fields
  Set the location of the reference point. Use the reference point to constrain the rotation and scaling of an individual or group of vertices.
Shape Channel button
  Enable to use the Shape channel in the Channel Editor. Disable to use individual Vertex channels in the Channel Editor. See Reshaping Using the Channel Editor.
Sort button
  Enable to sort non-flat surfaces where overlapping transparent regions are causing artefacts. By default, the reference point appears in the centre of the extended bicubic. When unselected, the reference point is green.
Auto Adjust button
  Scales adjacent tangents automatically. Auto Adjust creates a smooth curve between points in the deformation. If you want to work on a specific area of the image without affecting other tangents, disable Auto Adjust.

NoteIf you move a tangent explicitly, it is not affected by Auto Adjust. Click Reset Points or Reset Shape so that the tangents will be affected by the Auto Adjust mode.

3D Handles button
  Enables Z buffering of the vertices. By default, the vertices are always visible, regardless of their position in Z space in relation to other media.
Reset Selection box
  Select Reset Shape to reset the surface shape handles to their default position. The handles are reset in the current frame only. If Auto Key is enabled, a shape key is added at the current frame. Select Reset Points to reset selected points on the surface.