How do the Natron and Nuke Merge documents define operators, premultiplication expectations and the 'matte', 'mask' and 'stencil' operations, and do they agree?
Natron (rb-2.5) and Nuke (17.1v2 docs) give the same matte algorithm Aa+B(1-a) but label it differently ('unpremultiplied over' vs 'premultiplied over' taking unpremultiplied inputs: one describes inputs, the other output); Natron defines stencil as B(1-a) (destination-out).
Natron (rb-2.5) and Nuke (17.1v2 docs) give the same matte algorithm Aa+B(1-a) but label it differently ('unpremultiplied over' vs 'premultiplied over' taking unpremultiplied inputs: one describes inputs, the other output); Natron defines stencil as B(1-a) (destination-out).
Curator qualifications: Alpha-masking setting dependence (F2) is documentation-level for generic Merge ops; RE-E-05's code reading that matte is forced in code must be cited alongside (C2-B84-AUDIT3 hint); RE-E-05 not reviewed here. Nuke stencil formula wording not re-read beyond the list.
Limitations: Docs only.
Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.
Structured fields
{
"citations": [
{
"url": "https://natron.readthedocs.io/en/rb-2.5/plugins/net.sf.openfx.MergePlugin.html",
"note": "Natron rb-2.5 Merge plugin doc operator list; Nuke reference guide Merge page (Nuke 17.1v2 docs)"
},
{
"url": "https://learn.foundry.com/nuke/content/reference_guide/merge_nodes/merge.html",
"note": "Natron rb-2.5 Merge plugin doc operator list; Nuke reference guide Merge page (Nuke 17.1v2 docs)"
}
]
}Evidence claims
- [sourced_fact] Natron (rb-2.5) and Nuke (17.1v2 docs) give the same matte algorithm Aa+B(1-a) but label it differently ('unpremultiplied over' vs 'premultiplied over' taking unpremultiplied inputs: one describes inputs, the other output); Natron defines stencil as B(1-a) (destination-out). · locator: Natron rb-2.5 Merge plugin doc operator list; Nuke reference guide Merge page (Nuke 17.1v2 docs) source
Rights
| component | license | hosting | redistribution | modification | training | Evidence and notes |
|---|---|---|---|---|---|---|
| documentation | unknown | permitted | permitted | unknown | unknown | Applies to this original summary only, not to the cited sources. |