2017

Table Of Contents
(a) Vertices and tangent handles on an extended bicubic surface
To move a handle on a bilinear or extended bicubic surface, click the handle that you want to edit.
The selected handle appears in red. Use the cursor to drag the handle to its new position.
Each corner has two tangent handles. Lengthen or move the tangents to change the shape of the
bicubic between corners.
All of the animation modifications you make to a shape are saved. If you decide to change a shape,
then change it back to the original shape, your modifications are not lost.
Surface Blending Modes
Use the Blend Mode box to select how the front and matte clips or the front and back clips are combined.
For example, use Screen for blending a fire or a lightning bolt shot on black that you want to composite
with a different background.
You can select between a number of Flame or Photoshop blend modes by making a selection in the Blend
Type box. Some of the blend modes are similar (or identical) between the different types, but are repeated
with the mode names you are used to working with.
Offsetting a Surface
By default, a surface's axis is at the centre of the surface. Use the Surface Offset X and Y fields to offset a
surface along the X-axis or Y-axis. All rotations, scaling, and shearing applied to a surface are applied about
its axis. The location of the axis is indicated by the axis icon in the scene.
To offset a surface:
1 Select the surface you want to offset.
510 | Chapter 15 Compositing in 3D Space with Action