Register aligned scene latents for three training datasets

README.md

@@ -267,3 +267,39 @@ The downloader checks archive hashes before extraction.
 The training loader checks dataset and frozen codec identities.
 The image encoders compute features during training.
 <!-- partprobe3d-ss-targets:end -->
+
+<!-- partprobe3d-scenes:start -->
+## Voxel-aligned 32³ scene latents
+
+These optional caches contain one token per saved reference voxel.
+Overlapping objects share that token and retain separate membership labels.
+The `latent_valid` flag identifies cells with a native encoder output.
+Invalid cells retain their reference coordinates and contain zero latent values.
+The archives preserve the original NPZ files, calibration transforms, and codec provenance.
+
+| Dataset | Training views | Transfer, GB |
+| --- | ---: | ---: |
+| [3dfront](optional/scene/32/3dfront/index.json) | 39,930 | 4.590 |
+| [sage](optional/scene/32/sage/index.json) | 17,456 | 1.176 |
+| [foundationpose](optional/scene/32/foundationpose/index.json) | 42,256 | 5.046 |
+
+Restore the matching observation bundles before reading scene targets.
+The `slat-seg` task downloads those observations without SS or object latent targets.
+
+```bash
+python -m preprocess.huggingface download --repo cubec/PartProbe3D-preprocessed --task slat-seg
+```
+
+Restore the selected scene caches:
+
+```bash
+python -m preprocess.huggingface download --repo cubec/PartProbe3D-preprocessed --dataset 3dfront --bundle-root optional/scene/32 --cleanup
+python -m preprocess.huggingface download --repo cubec/PartProbe3D-preprocessed --dataset sage --bundle-root optional/scene/32 --cleanup
+python -m preprocess.huggingface download --repo cubec/PartProbe3D-preprocessed --dataset foundationpose --bundle-root optional/scene/32 --cleanup
+```
+
+The restored caches reside under `datasets/<dataset>/slat/32/scene_targets/`.
+`dataloader.slat_scene.SceneTargetDataset` reads them with their matching saved observations.
+Raw meshes and source datasets are unnecessary for this reader.
+Scene downloads remain separate from object targets and default task downloads.
+<!-- partprobe3d-scenes:end -->

training/index.json

@@ -126,6 +126,27 @@
     "evaluation/ycbv": {
       "component": "optional/evaluation/ycbv",
       "bytes": 1669857280
+    },
+    "scene/32/3dfront": {
+      "component": "optional/scene/32/3dfront",
+      "bytes": 4590407680,
+      "views": 39930,
+      "resolution": 32,
+      "source_manifest_sha256": "7e4c7f6b1bee374b3cb8469e7cf7ae0f3452d06084630c93c004c866b83e8489"
+    },
+    "scene/32/sage": {
+      "component": "optional/scene/32/sage",
+      "bytes": 1176248320,
+      "views": 17456,
+      "resolution": 32,
+      "source_manifest_sha256": "0eb124ca62c846bc37604ae5b6e56b50fd50511c46a23a36924122dff1c92b5f"
+    },
+    "scene/32/foundationpose": {
+      "component": "optional/scene/32/foundationpose",
+      "bytes": 5046333440,
+      "views": 42256,
+      "resolution": 32,
+      "source_manifest_sha256": "08bc7afbadab1fe27bf8ba1c039b428cebe582937ad18b8332f698295b2189e2"
     }
   },
   "base_git_revision": "aac7b493e1e5e10512857a2582233c99fedda9c5",