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README.md

@@ -72,6 +72,25 @@ rm -rf data/scenesmith-preprocessed-data
 
 To preprocess ArtVIP assets yourself (or to process updated versions), use [mesh-to-sim-asset](https://github.com/nepfaff/mesh-to-sim-asset) to convert from USD to Drake SDFormat.
 
+## AmbientCG Material Embeddings
+
+Pre-computed CLIP embeddings for [AmbientCG](https://ambientcg.com/) PBR materials, enabling text-based material retrieval for walls, floors, and surfaces.
+
+The embeddings are computed from AmbientCG preview images using CLIP (ViT-H-14-378-quickgelu, 1024D).
+
+> **Note:** You still need to download the actual material textures from AmbientCG separately (see SceneSmith README). This dataset only contains the pre-computed embeddings to skip the computation step.
+
+### Usage with SceneSmith
+
+```sh
+huggingface-cli download nepfaff/scenesmith-preprocessed-data \
+    --repo-type dataset \
+    --include "ambientcg/embeddings/**" \
+    --local-dir data/scenesmith-preprocessed-data
+mv data/scenesmith-preprocessed-data/ambientcg/embeddings data/materials/embeddings
+rm -rf data/scenesmith-preprocessed-data
+```
+
 ## Attribution
 
 The articulated object assets are derived from the [ArtVIP](https://huggingface.co/datasets/x-humanoid-robomind/ArtVIP) dataset, licensed under the [Apache License 2.0](https://www.apache.org/licenses/LICENSE-2.0).