kick has a -rg flag that specifies what region of the image to render.
The x,y coordinates start at the top-left corner. So, for example, for a 960 x 540 image:
- (0,0) is the top-left corner.
- (1919,1079) is the bottom-right corner.
To render a 960x540 image in four quarters:
In ASS file, the render region is specified in the options node: