This little code will help you to control nuke 'rotopaint' nodes clone & paint brush opacity via some short-cut keys. I created this code for my fellow artist who's working with me in paint department. Short-cut keys are assigned as per his need. You can use your custom short-cut keys.
paintOpacity controller
Updated: 30 September 2013
Author: satheesh
Compatible Nuke versions: 6.0 or later
Compatibility: Linux, Mac, Windows
There are 5 control option.
'shift+>', 'shift+<'
user can up & down the opacity value using 'shift+>' and 'shift+<'. This will jump between current value to +0.05 or -0.05.
If your value will 1 it start to decrease 0.95, 0.9, 0.85 so one so forth....
'ctrl+>', 'ctrl+<'
user can up & down the opacity value using 'ctrl+>' and 'ctrl+<'. This will jump between current value to +0.01 or -0.01.
If your value will 1 it start to decrease 0.99, 0.98, 0.97 so one so forth....
'ctrl+Shift+<</span>' and 'ctrl+Shift+<'
This will return the opacity value to default 1 and 0.
for more information: http://satheeshnuketutorials.blogspot.in/2013/08/paintnodeopacitypy.html