Dynamic Aspect Mask for Hiero as a soft effect on timeline.
MB Hiero DynamicAspect
First submitted: 14 November 2025
Author: marek.bires
Compatible Nuke versions: 10.0 or later
Compatibility: Source
Since Hiero's build-in aspect mask is cropping everything in viewer including Burn-In, you can use this tool to add aspect mask as a soft effects on timeline. You can define aspect mask ratio via floating point number so you can add your own pillarbox or letterbox mask which are not supported in Hiero by default.
Inside of this gizmo is only one Crop node which is calculating aspect mask by input resolution and mask ratio. Currently there is only option for full mask.
Installation:
Best way is to copy both files (MB_DynamicAspect.gizmo and MB_DynamicAspect_register.py) into .nuke/Python/Startup folder. No need to change init.py or menu.py files. MB_DynamicAspect will be added into soft effects menu in Hiero
Note: This folder path is case-sensitive. Ensure "Python" and "Startup" begin with a capital letter.
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