Update README.md

README.md

@@ -29,4 +29,31 @@ Arb-Objaverse Dataset
 
 ## Rendering Scripts
 
-Rendering scripts for generating this dataset are available in the `./rendering` directory. We utilize `blenderproc==2.5.0` for Blender rendering. Environmental HDRs are sourced from the [Haven Dataset](https://dlr-rm.github.io/BlenderProc/examples/datasets/haven/README.html).
+Rendering scripts for generating this dataset are available in the `./rendering` directory. To use these scripts, start by installing the necessary dependencies
+```
+pip install blenderproc==2.5.0
+```
+
+The environmental HDRs used in this dataset are sourced from [Poly Haven](https://polyhaven.com/hdris). You can download all available environmental HDRs using the following command:
+```
+blenderproc download haven haven_dataset --types hdris
+```
+Alternatively, you may choose to use your own custom environmental maps.
+
+Modify `GLB_PATH`, `OUTPUT_DIR` and `HDRI_PATH` variables to point to your respective paths, and then run the following commands:
+```
+GLB_PATH=__YOUR_GLB_PATH__
+OUTPUT_DIR=__YOUR_OUTPUT_DIR__
+HDRI_PATH=__HDRI_PATH__
+
+# render the normal and material maps
+blenderproc run render_normal_orm.py --glb_path ${GLB_PATH} --output_dir ${OUTPUT_DIR}
+
+# render albedo map
+blenderproc run render_albedo.py --glb_path ${GLB_PATH} --output_dir ${OUTPUT_DIR}
+
+# render rgb images illuminated by HDR map
+blenderproc run render_color.py --glb_path ${GLB_PATH} --hdri_path ${HDRI_PATH} --output_dir ${OUTPUT_DIR}
+# render rgb images illuminated by point lights
+blenderproc run render_color.py --glb_path ${GLB_PATH} --output_dir ${OUTPUT_DIR}
+```