Graphics Programs Reference
In-Depth Information
The last object that we need to create is a plane facing straight at the camera;
let's work on that.
18. Select the camera, switch to camera view (
View → Camera
) and snap the 3D
Cursor to the camera (
Object → Snap → Cursor to Selected
or press
Shift + S
,
3
).
19. With the 3D Cursor posiioned properly, let's add a plane to the scene (
Add →
Mesh → Plane
) and get it aligned with the view angle (
Align
to view opion in the
lower region of the
Tool Shelf
sidebar).
20. Now let's move the plane
3.3
units in the negaive direcion of the
Local Z
axis
(
G, Z, Z, -3.3
). Next, we must scale the plane by a factor of
1.6
in the
Local X
Axis (
S, X, X, 1.6
). This plane must be named
alpha_control
(
Item
panel in
the
Properties
sidebar).
21. This object must be associated only to layer 2 of the scene. To do this, select it, go
to the
Object
tab in the
Properties Editor
, and check only the buton for layer 2 in
the
Layers
grid located in the Relaions panel; alternaively, we can just press
M
,
2
,
Enter
just ater selecing the object.
The
alpha_control
plane will be used to manually set the alpha of the rendered
image. To do that, we need to add a material and set it appropriately to be used
later in the node compositor.
22. With the
alpha_control
plane selected, let's go to the
Material
tab of the
Properties Editor
, add a new material, and name it
alpha_fade
. Now set it as
follows:
F
Diffuse color: 0.0 Red, 0.0 Green, 0.0 Blue (Diffuse panel)
F
Shadeless: Enabled (Shading panel)
23. Now let's go to the
Texture
tab, add a new texture with the name
blend_fade
,
and set it as follows:
F
Type: Blend
F
Blend panel:
Progression: Linear
Orientaion: Verical
F
Brightness: 2.0 (Colors panel)
F
Influence panel:
Blend: Add
RGB to Intensity: Enabled
Default color: 1.0 Red, 1.0 Green, 1.0 Blue
