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houdini-interchange

Interchange skill — load-on-demand import/export of Houdini geometry and scenes through production formats (native bgeo/geo, OBJ, Alembic, FBX, USD) plus filesystem probing. Use these typed tools instead of hand-building ROP/LOP/SOP networks with raw scripts.

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Install command

npx skills add https://github.com/loonghao/dcc-mcp-houdini --skill houdini-interchange

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Source

loonghao/dcc-mcp-houdini

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UpdatedMay 30, 2026 at 04:10

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SKILL.md

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name	houdini-interchange
description	Interchange skill — load-on-demand import/export of Houdini geometry and scenes through production formats (native bgeo/geo, OBJ, Alembic, FBX, USD) plus filesystem probing. Use these typed tools instead of hand-building ROP/LOP/SOP networks with raw scripts.
license	MIT
compatibility	dcc-mcp-houdini 0.1+, Houdini 20.5+, dcc-mcp-core 0.17+
allowed-tools	Bash Read Write Edit
metadata	{"dcc-mcp":{"dcc":"houdini","layer":"domain","stage":"interchange","version":"1.0.0","tags":["houdini","interchange","import","export","usd","alembic","fbx","obj","bgeo","cache"],"search-hint":"import export usd alembic abc fbx obj bgeo cache save geometry interchange","tools":"tools.yaml"}}

houdini-interchange

Typed import/export tools for moving geometry and scenes across DCCs. Exports return structured written_files, skipped, and warnings fields so an agent can tell what actually landed on disk versus what the installed runtime could not produce.

Tool groups

interchange-probe: probe_file (affinity: any, pure filesystem).
interchange-import: import_geometry (File SOP into a SOP network).
interchange-export: export_geometry (native/OBJ via saveToFile), export_alembic, export_fbx, export_usd.

Format selection guidance

Goal	Tool	Notes
Round-trip Houdini geometry	`export_geometry` → `.bgeo`/`.geo`	Fastest, lossless, native.
Hand geometry to another DCC	`export_geometry` → `.obj`, or `export_alembic`	OBJ for static meshes; Alembic for animated/large caches.
Animated caches	`export_alembic` with `frame_range`	`render: true` to actually write frames.
Rigged/scene to game engine	`export_fbx`	`root_node` selects the `/obj` subtree.
USD/Solaris pipelines	`export_usd`	Exports a LOP node's composed `stage()`; reports `root_layer`.

Tracer-bullet flow (local, no render farm)

houdini_geometry__create_primitive(parent_path="/obj/geo1", primitive="box")
export_geometry(node_path="/obj/geo1/box1", output_path="/tmp/box.bgeo")
probe_file(file_path="/tmp/box.bgeo") → exists: true, format: geometry
import_geometry(parent_path="/obj/geo2", file_path="/tmp/box.bgeo") → round-trip

Export tools that drive a ROP are async with generous timeout_hint_secs because caches and FBX writes can be long-running.

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Source

loonghao

loonghao/dcc-mcp-houdini

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Useful forSOC

Software DevelopersComputer and Mathematical Occupations15-1252L4

name	houdini-interchange
description	Interchange skill — load-on-demand import/export of Houdini geometry and scenes through production formats (native bgeo/geo, OBJ, Alembic, FBX, USD) plus filesystem probing. Use these typed tools instead of hand-building ROP/LOP/SOP networks with raw scripts.
license	MIT
compatibility	dcc-mcp-houdini 0.1+, Houdini 20.5+, dcc-mcp-core 0.17+
allowed-tools	Bash Read Write Edit
metadata	{"dcc-mcp":{"dcc":"houdini","layer":"domain","stage":"interchange","version":"1.0.0","tags":["houdini","interchange","import","export","usd","alembic","fbx","obj","bgeo","cache"],"search-hint":"import export usd alembic abc fbx obj bgeo cache save geometry interchange","tools":"tools.yaml"}}

houdini-interchange

Tool groups

interchange-probe: probe_file (affinity: any, pure filesystem).
interchange-import: import_geometry (File SOP into a SOP network).
interchange-export: export_geometry (native/OBJ via saveToFile), export_alembic, export_fbx, export_usd.

Format selection guidance

Goal	Tool	Notes
Round-trip Houdini geometry	`export_geometry` → `.bgeo`/`.geo`	Fastest, lossless, native.
Hand geometry to another DCC	`export_geometry` → `.obj`, or `export_alembic`	OBJ for static meshes; Alembic for animated/large caches.
Animated caches	`export_alembic` with `frame_range`	`render: true` to actually write frames.
Rigged/scene to game engine	`export_fbx`	`root_node` selects the `/obj` subtree.
USD/Solaris pipelines	`export_usd`	Exports a LOP node's composed `stage()`; reports `root_layer`.

Tracer-bullet flow (local, no render farm)

houdini_geometry__create_primitive(parent_path="/obj/geo1", primitive="box")
export_geometry(node_path="/obj/geo1/box1", output_path="/tmp/box.bgeo")
probe_file(file_path="/tmp/box.bgeo") → exists: true, format: geometry
import_geometry(parent_path="/obj/geo2", file_path="/tmp/box.bgeo") → round-trip

Export tools that drive a ROP are async with generous timeout_hint_secs because caches and FBX writes can be long-running.