Nodes · 3D
VDBRead
3Dv1app
Overview
Reads a .vdb volume cache (smoke, clouds, fire from FX or a bought pack) into the scene as a standard UsdVol prim. Loads off-thread — the box draws dim while streaming, bright when ready. Rendering the volume itself lands with the volume pass; today you get the placed, pickable bounding box.
Inputs
| Input | What it takes |
|---|---|
| in | the image this node works on |
Outputs
| Output | Type |
|---|---|
| out | Scene |
Parameters
| Parameter | Type | Default | What it does |
|---|---|---|---|
| file | Text | String::new( | The .vdb on disk. Big caches stream in the background — the viewport never waits on this file. |
| grid | Text | "density".into( | Which grid (field) to read — 'density' in most smoke/cloud caches, 'temperature' for fire. Empty = the first float grid in the file. |
| tx | Float | 0 | Translate X — position along the world X axis, metres. |
| ty | Float | 0 | Translate Y — position along the world Y axis (up), metres. |
| tz | Float | 0 | Translate Z — position along the world Z axis, metres. The camera looks down −Z. |
| rx | Float | 0 | Rotate around X, degrees. |
| ry | Float | 0 | Rotate around Y (turntable), degrees. |
| rz | Float | 0 | Rotate around Z (roll), degrees. |
| sx | Float | 1 | Scale along X. 1 = unchanged. |
| sy | Float | 1 | Scale along Y. |
| sz | Float | 1 | Scale along Z. |
See also
- The 3D system — How to put geometry, cameras and volumes in the comp — without becoming a 3D application.