docs: add GSO30 dataset readme

README.md

@@ -1,3 +1,96 @@
 ---
 license: mit
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+
+# Streaming3D Dataset
+
+This dataset contains assets used by the Streaming3D benchmark. The current
+release documents the `GSO30` subset; other subsets may be added later.
+
+## GSO30
+
+`GSO30` is a 30-object subset derived from Google Scanned Objects. Each object
+directory contains training renders, evaluation assets, and the original object
+mesh/material files.
+
+### Object List
+
+```text
+alarm backpack bell blocks chicken cream elephant grandfather grandmother hat
+leather lion lunch_bag mario oil school_bus1 school_bus2 shoe shoe1 shoe2
+shoe3 soap sofa sorter sorting_board stucking_cups teapot toaster train turtle
+```
+
+### Directory Structure
+
+```text
+GSO30/
+  <object_id>/
+    meshes/
+      model.glb
+      model.obj
+      model.mtl
+      texture.png
+    render_spiral_100/
+      images/
+        000.png ... 099.png
+      masks/
+        000.png ... 099.png
+      model/
+        000.png ... 099.png
+        000.npy ... 099.npy
+      transforms.json
+      model_norm.obj
+      model_norm.mtl
+    render_mvs_25/
+      model_norm.glb
+      model_norm.obj
+      model_norm.mtl
+      model/
+        000.png ... 024.png
+        000.npy ... 024.npy
+```
+
+Some object folders also include auxiliary metadata, thumbnails, or legacy
+render folders. The benchmark protocol uses the paths above.
+
+### Usage
+
+For training or reconstruction input, use all 100 images from:
+
+```text
+GSO30/<object_id>/render_spiral_100/images/{000..099}.png
+```
+
+The corresponding masks are stored in:
+
+```text
+GSO30/<object_id>/render_spiral_100/masks/{000..099}.png
+```
+
+Camera metadata for the 100 spiral views is available in:
+
+```text
+GSO30/<object_id>/render_spiral_100/transforms.json
+GSO30/<object_id>/render_spiral_100/model/{000..099}.npy
+```
+
+For evaluation, use the normalized GLB mesh and the 25 provided camera views
+from `render_mvs_25`:
+
+```text
+GSO30/<object_id>/render_mvs_25/model_norm.glb
+GSO30/<object_id>/render_mvs_25/model/{000..024}.npy
+```
+
+The matching reference renders for those views are:
+
+```text
+GSO30/<object_id>/render_mvs_25/model/{000..024}.png
+```
+
+In short, the default protocol is:
+
+1. Train or reconstruct from all `render_spiral_100/images` frames.
+2. Evaluate by rendering or comparing against `render_mvs_25/model_norm.glb`
+   using the 25 camera poses in `render_mvs_25/model/*.npy`.