OC Character Body Block

The name undersells it. OC Character Body Block isn't just about anatomy - it's the identity block. Its catalog covers the "who is this person" questions before you ever get to hair and clothes: subject (1boy, 1girl, multi-character counts), identity and role tags like ace_queen, age, skin, body build, plus the physical detail subcategories - shoulders, chest, waist, stomach, legs, feet, and wings. Roughly 275 options across 13 subcategories, all sourced from the pack's Danbooru-style tag dataset.

It's one of the block nodes that make up the "OC" side of this pack: you pick a fragment from a dropdown, the block resolves it into a real prompt tag, and OC Generator eventually sorts it into the Body position of the final string. Since earlier keywords carry more weight on the SDXL-lineage models this pack targets, the body block tends to land right after theme and before face and hair - near the front, where identity matters.

The controls that matter

Every block node in the pack shares the same three-part selection system, and this one is the biggest demo of how it behaves:

• group - narrows selection to one subcategory (对象 / identity / age / wings, and so on). Default is __all_groups__, meaning the whole catalog.
• mode - fixed, randomize, increment, or decrement. fixed keeps your pick; randomize samples the pool; the step modes cycle through it (useful for batch variations with the step input).
• option - the big static dropdown, all 275 entries. Entries read like 对象 | 1男孩 -> 1boy, i.e. subcategory | Chinese label -> English tag.

That option dropdown is static - it does not shrink when you change group. The author is upfront about this in the code comments and the tooltips; there's no frontend magic to make the list filter live. What happens at execution is: if your chosen option isn't in the current group, the block silently falls back to the first valid item in that group and flags it in debug_text. So when randomize spits out something you didn't pick, the first suspect is a group/option mismatch.

Under the hood, randomize isn't really random. It hashes the block key, group, option label, and your seed into a stable index, so the same seed always gives the same pick - reproducible variations, which is exactly what you want when you're generating an OC concept sheet across different seeds. There's an enabled boolean too, so you can leave a body block in the graph and switch it off without deleting it.

The outputs

All three matter in this pack's rhythm:

• oc_block - the structured block; wire it into OC Generator.
• prompt_preview - the resolved fragment (the 1boy, the ace_queen), so you can read your character without running anything.
• debug_text - execution details: which group, which index in the pool, whether a fallback happened. This is your debugging lifeline.

Installing it

Same pack, same install:

cd ComfyUI/custom_nodes
git clone https://github.com/Zhuozhuo-219/ComfyUI-OC-Generator

Restart ComfyUI, or use ComfyUI Manager (search ComfyUI-OC-Generator). No extra Python deps, no models - the tag catalog rides along inside the repo.

A note on expectations

This is a young, low-traffic pack; you won't find a mountain of community write-ups about it, and the catalog is a curated cut of Danbooru-style tags rather than a complete dump. The body block is one of the more capable nodes in the set, but it's still a dropdown over a fixed dataset - if your OC needs something the catalog doesn't cover, type it into OC Generator's prefix_prompt and move on.