3D Compositing with Action > Action: Surfaces > Modifying Surfaces >

# Vertices Settings for Bilinear Surfaces

For bilinear surfaces, there are extra controls available in the Vertices tab.

(a) Offsets fields(b) Shape Channel button(c) Stabilizer controls(d) Vertex Translation fields(e) Reset Selection box(f) Edit Offsets button

Upper Left X Offset field
  Displays the position of the upper left offset point along the X axis. Enable Edit Offsets, and use Media Front view to see the offset point. Editable.

Upper Left Y Offset field
  Displays the position of the upper left offset point along the Y axis. Enable Edit Offsets, and use Media Front view to see the offset point. Editable.

Upper Right X Offset field
  Displays the position of the upper right offset point along the X axis. Enable Edit Offsets, and use Media Front view to see the offset point. Editable.

Upper Right Y Offset field
  Displays the position of the upper right offset point along the Y axis. Enable Edit Offsets, and use Media Front view to see the offset point. Editable.

Lower Left X Offset field
  Displays the position of the lower left offset point along the X axis. Enable Edit Offsets, and use Media Front view to see the offset point. Editable.

Lower Left Y Offset field
  Displays the position of the lower left offset point along the Y axis. Enable Edit Offsets, and use Media Front view to see the offset point. Editable.

Lower Right X Offset field
  Displays the position of the lower right offset point along the X axis. Enable Edit Offsets, and use Media Front view to see the offset point. Editable.

Lower Right Y Offset field
  Displays the position of the lower right offset point along the Y axis. Enable Edit Offsets, and use Media Front view to see the offset point. Editable.

TipIn Media Front view, you can also move the offset points directly in the image window. The offset fields in the Vertices menu are updated accordingly.

Stabilizer button
  Opens the Stabilizer menu to apply stabilizing data to a surface or surface offsets.

Stabilizer box
  Select Track or Offsets, then click the Stabilizer button.

Vertex Position X field
  Defines the position of the bilinear or bicubic vertices on the X axis. Editable.

Vertex Position Y field
  Defines the position of the bilinear or bicubic vertices on the Y axis. Editable.

Vertex Position Z field
  Defines the position of the bilinear or bicubic vertices on the Z axis. Editable.

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.

Edit Offsets button
  Enable to move the bilinear anchor points away from the entire image (used with four-point tracking). Use Media Front view to see the offset points. See Editing Tracker Offsets of a Bilinear Surface.

Reset Selection box
  Select whether to reset surface handles to their default position (Reset Shape) or reset selected points (Reset Select) on a bilinear or bicubic surface.