C_AlphaGenerator

C_AlphaGenerator creates a rectangular or elliptical mask in the alpha channel. It's primarily used for manual stitching and is included in the Manual 2D and 3D Stitching toolsets included in C_CameraSolver's Export dropdown.

Inputs and Controls

Connection Type	Connection Name	Function
Input	src	The image sequence to which the alpha mask is added.

Control (UI)	Knob (Scripting)	Default Value	Function
C_AlphaGenerator Tab
Local GPU	gpuName	N/A	Displays the GPU used for rendering when Use GPU if available is enabled. Local GPU displays Not available when: • Use CPU is selected as the GPU device in the Preferences. • no suitable GPU was found on your system. • it was not possible to create a context for processing on the selected GPU, such as when there is not enough free memory available on the GPU. You can select a different GPU device, if available, by navigating to the Preferences and selecting an alternative from the GPU Device dropdown. Note: Selecting a different GPU requires you to restart Nuke before the change takes effect.
Use GPU if available	useGPUIfAvailable	enabled	When enabled, rendering occurs on the Local GPU specified, if available, rather than the CPU. Note: Enabling this option with no local GPU allows the script to run on the GPU whenever the script is opened on a machine that does have a GPU available. You should also select this if you wish to render from the command line with the --gpu option. See Nuke 14 Release Notes for more information on the GPUs Nuke supports.
Shape	alphaShape	Rectangular	Sets the shape of the alpha mask generated, either Rectangular or Elliptical.
Size (w,h)	alphaSize	1,1	Sets the width and height of the of the mask relative to the image width and height, where 1,1 is equal to the whole image, minus the feathering.
Feather	alphaFeather	0.4	Controls the feathering at the edges of the mask, where 0 is equal to no feathering.