The Export Geometry Cache to USD node
When to use it
The USD side of Export Geometry Cache to Alembic. A deforming cache streamed out to a USD file, one frame at a time.
Prim Path is now written exactly as you type it, defaulting to /mesh. Older exports from this node ignored the setting and always wrote /sculpted_cache. A pipeline still looking for that old path needs pointing at /mesh, or set Prim Path back to /sculpted_cache.
Pins
| Pin | Type | Description |
|---|---|---|
StreamingCache |
Streaming Geometry Cache | The animated cache to write out, sculpt and all. |
Settings
| Setting | Type | Description |
|---|---|---|
Prim Path |
Text | Where the mesh sits inside the file, as a path. |
Flatten |
True/False | Writes the whole cache as one mesh, with each material slot marked out as a subset. That is the smaller, faster-reading file. Turn it off and you get a separate mesh per material section instead. |
Start Frame |
Whole number | First frame to write. Clamped to what the source actually has. |
End Frame |
Whole number | Last frame to write, counted in. Leave it at -1 to run through to the end of the source. |
Rotation |
Vector | Turns every frame as it is written, in degrees. The default quarter-turn takes MeshMorpher's Z-up over to Y-up, which is what the file declares itself to be. Zero it out and the cache opens lying on its back. |
Scale |
Vector | Scale applied along with the rotation. One negative component flips handedness, which is what the -1 on Y is there for. |
Flip Mesh |
True/False | Reverses triangle winding on the way out. Off by default here, unlike the Alembic export, because USD reads the corner normals differently. |
Invert Normals |
True/False | Flips the normals as they are written. The stock combination of Y-up, the -1 scale and the winding setting already comes out right, so leave this off unless you have changed those and the surface shades inside out. |
Use Custom Frame Rate |
True/False | Sets the playback rate yourself instead of taking the one the source reports. |
Custom Frame Rate |
Number | Frames per second stamped on the file. Every frame in the range still gets written, so a lower number here plays the same animation slower rather than dropping anything. |
Write Velocities |
True/False | Writes how far each vertex moves between frames, which is what a renderer needs to produce motion blur. |
Available in Mesh Morpher Graph and Mesh Morpher Studio.