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Size (in pixels):Thumbnails:
The back faces of the layer will be rendered.Back Face
Modifies the motion blur that affects layers animated in the scene.
You can give the layer the appearance of moving at a different speed
than is set for Motion Blur in the Render tab.
Time Dilation
Working with Geometric Surfaces
When you create a layer, you are assigning a source input to a geometric object
that defines the surface on which the source is mapped. You can replace the
assigned surface object with a different one, as well as disconnect a surface
object in the Schematic and replace it with another. By default, when you
create a layer, the surface type is determined by the last geometric setting
chosen in the Layer Editor.
NOTE When you create a layer in the Schematic view, the default surface is Bilinear.
There are seven surface types available in Reaction: bicubic, bilinear, box,
frustum, geometry, plane, and sphere. The bilinear surface is a planar surface
with four vertices, one at each corner. The vertices are joined by straight line
segments using linear interpolation. The box, frustum, and sphere surfaces
are 3D primitives meshes with no control vertices.
Modifying Surface Shape and Geometry
You can change a surface's shape by scaling it using the transformation tools.
You can also modify a surface's base geometry from the Surfaces tab in the
Reaction tool UI. You can increase or decrease the number of segments to
change the number and shape of the surface's polygons, which may affect its
shape, how it reacts to lights in the scene, and how texture maps are displayed.
TIP You can toggle the display of the icons that represent the camera, lights, axis,
and transformation by selecting Icons on the Render tab.
To modify a surface's geometry:
1 Select the Surfaces tab.
2 Select a layer from the Layer Editor.
254 | Chapter 12 Multilayer Compositing and 3D Effects