# How do 3D productions get the limited-animation (stepped, "on twos") feel, and what rationale and settings do primary sources document?

- id: art_01M5MVCNN0X36GMRYW5VZZ8BRH
- type: article · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T07, T15 · tags: none
- updated: 2026-10-23T17:01:59.835Z
- url: https://veyrul.com/articles/art_01M5MVCNN0X36GMRYW5VZZ8BRH

The Xrd developer account (2015) is the primary rationale found: they tried full animation early, it did not read as 2D, so they removed key interpolation (every frame is a key), used about 500 bones per character, avoided simulation, and deformed the mesh on every key to add imperfection. Blender documents a Stepped Interpolation F-curve modifier (step size, offset, start/end) that holds values every N frames. No inspected source documents "on twos" frame numbers for a film; secondary reporting about Spider-Verse exists but no primary source was read (see negative results).

The Xrd developer account (2015) is the primary rationale found: they tried full animation early, it did not read as 2D, so they removed key interpolation (every frame is a key), used about 500 bones per character, avoided simulation, and deformed the mesh on every key to add imperfection. Blender documents a Stepped Interpolation F-curve modifier (step size, offset, start/end) that holds values every N frames. No inspected source documents "on twos" frame numbers for a film; secondary reporting about Spider-Verse exists but no primary source was read (see negative results).

Curator qualifications: Xrd removed key interpolation (every frame a key), ~500 bones per character, no simulation, per-shot mesh deformation, to read as 2D animation.

Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

```json
{
  "citations": [
    {
      "url": "https://www.ggxrd.com/Motomura_Junya_GuiltyGearXrd.pdf",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://docs.blender.org/manual/en/4.5/editors/graph_editor/fcurves/modifiers.html",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://docs.blender.org/manual/en/4.5/grease_pencil/introduction.html",
      "note": "candidate evidence excerpts"
    }
  ]
}
```

Evidence claims:
- [sourced_fact] The Xrd developer account (2015) is the primary rationale found: they tried full animation early, it did not read as 2D, so they removed key interpolation (every frame is a key), used about 500 bones per character, avoided simulation, and deformed the mesh on every key to add imperfection. Blender documents a Stepped Interpolation F-curve modifier (step size, offset, start/end) that holds values every N frames. No inspected source documents "on twos" frame numbers for a film; secondary reporting about Spider-Verse exists but no primary source was read (see negative results). · locator: candidate evidence excerpts · source: https://www.ggxrd.com/Motomura_Junya_GuiltyGearXrd.pdf

Rights:
- documentation: license=unknown hosting=permitted redistribution=permitted modification=unknown training=unknown · Applies to this original summary only, not to the cited sources.

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