Bump
compositing node
Builds a bump map from a plane.
See also: Lighting
Builds a bump map from an image. The bump map can either be created as a new plane, or it can replace the plane it was built from.
A bump map is built by detecting luminance edges in the image. These edges become the bumps. The effect can be scaled up to mimic the effect of a rough surface, or reduced to add only a slight amount of lighting variation.
Usage
Bump maps can be used by the Lighting COP to produce semi-realistic lighting on originary images.
Parameters
Bump
|
Bump |
The bumps are computed by variations in luminance; this determines how to compute that luminance. |
|
Scale |
Scales the bumps after generation. |
|
Simple Bump Map |
If on, only 5 pixels are used to determine the bump map, otherwise all 8 neighbors plus the current pixel is used. |
|
Generate Bump Map |
If on, instead of converting planes to bump maps, a source plane is used and the output bump map is added to the plane list. |
|
Source Plane |
The plane to use as the bump source. |
|
Bump Name |
The name of the new bump plane, if a new plane is being generated. |
Scope
|
Plane Scope |
Specifies the scope for both the RGB components of Color, Alpha, and other planes. The (C)RGBA mask only affects Color components and Alpha. 'C' will toggle all the RGB components. For planes other than Color and Alpha, the plane name (plus component, if applicable) should be specified in the string field. The pulldown menu can be used to select planes or components present in this node. A plane is specified by its name. A component is specified by both its plane and component name. The '*' wildcard may be used to scope all extra planes. Any number of planes or components can be specified, separated by spaces. Examples: P N.x N.y P N Pz |
Frame Scope
|
Frame Scope |
Allows scoping of specific frames in the frame range. This is in addition to the plane scope (so a plane at a certain frame must be both plane scoped and frame scoped to be modified).
|
||||||||||||
|
Frame Range |
For Inside/Outside range, this parameter specifies the subrange of the sequence to scope (or unscope). This can be edited in Timeline viewer mode ( Ctrl + 2 in viewer). |
||||||||||||
|
Frame Dropoff |
For Inside/Outside Range, this parameter specifies certain number of frames before and after to slowly ramp up to scoped. The operation will be blended with its input to 'ease in' or 'ease out' the scoping effect over a number of frames. This can be edited in Timeline viewer mode ( Ctrl + 2 in viewer). |
||||||||||||
|
Non-scoped Effect |
For unscoped frames, this sets the blend factor between the input and modified images. Normally this is zero (use the input image). By setting this to a non-zero value, you can make unscoped frames be 'slightly' unscoped. The value can vary between 0 (unscoped) and 1 (scoped). |
||||||||||||
|
Frame List |
The frame list for 'Specific Frames'. Frame numbers should be separated by spaces. |
||||||||||||
|
Automatically Adjust for Length Changes |
If the sequence range changes, enabling this parameter will adjust the subrange and frame dropoff lengths to fit the new range. |
Local variables
|
L |
Sequence length |
|
S |
Start of sequence |
|
E |
End of sequence |
|
IL |
Input sequence length |
|
SR |
Sequence frame rate |
|
NP |
Number of planes in sequence |
|
W,H |
Width and height of image |
|
I |
Image index (0 at start frame) |
|
IT |
Image time (0 at start frame) |
|
AI |
Current plane array index |
|
PI |
Current plane index |
|
PC |
Num of channels in current plane |
|
CXRES |
Composite Project X resolution |
|
CYRES |
Composite Project Y resolution |
|
CPIXA |
Composite Project pixel aspect ratio |
|
CDEPTH |
Composite Project raster depth |
|
CBP |
Composite Project black point |
|
CWP |
Composite Project white point |