Add hero image + Visual tour section to README; ship rendered PNGs.

README.md

@@ -31,6 +31,22 @@ A curated **single-family preview** of the
 full release. Designed for reviewers to download in **under 5 minutes** and
 inspect the dataset's content + structure without pulling the full 12 TB.
 
+> ## 📊 Quick visual tour
+>
+> **All five publication-style figures from this preview are pre-rendered below**
+> (and again, fully interactive, in [`view_preview.ipynb`](view_preview.ipynb)).
+> The notebook is **rendered inline by HuggingFace with embedded plot outputs**,
+> so reviewers can see every figure on this page without downloading or
+> running anything.
+
+![Shot-gather panels — the manuscript intro figure](figs/shot_gather_panels.png)
+
+*Above: shot-gather panels. Velocity model on the left shows the three
+color-coded source positions (Left/Middle/Right = source idx 8/32/56);
+the three dark panels on the right are the corresponding 8 s gathers
+recorded by the 1,000-receiver streamer. Generated from the included
+`shot_gathers/8s/3-25Hz/...gom_151_il_0507.h5`.*
+
 This preview ships exactly the four HDF5 files that produce the manuscript's
 intro figure, so reviewers can reproduce that figure 1-for-1. Contents:
 
@@ -45,6 +61,51 @@ intro figure, so reviewers can reproduce that figure 1-for-1. Contents:
 Plus a slimmed `data/all.parquet` (4 rows) covering only these four files and
 the same 25-column schema as the full repo.
 
+## Visual tour (all 5 figures)
+
+The five panels below are PNGs rendered by `view_preview.py` from the four
+HDF5 files included here. The same plots appear interactively in
+[`view_preview.ipynb`](view_preview.ipynb).
+
+### 1. 3D cutaway of the SOS-smoothed velocity volume
+
+![3D cube cutaway of gom_151_sos.h5](figs/model_3d_cube_cutaway.png)
+
+*Three exposed faces (top, front, left) of the 619 × 1000 × 1000 volume
+on a 10 m grid, diverging seismic colormap centered at 3100 m/s.*
+
+### 2. Three orthogonal slices through the volume
+
+![Orthogonal slices through gom_151_sos.h5](figs/model_3d_orthogonal_slices.png)
+
+*The 2D slice we ship (`slice_gom_151_il_0507.h5`) is the inline-507 panel on
+the left. Red dashed lines mark where each panel's slice was taken in the
+other two views.*
+
+### 3. 2D velocity slice with acquisition geometry
+
+![2D velocity slice with streamer + source overlay](figs/slice_2d_velocity.png)
+
+*`slice_gom_151_il_0507.h5` overlaid with the streamer (every 25th of 1000
+receivers @ 10 m depth, 0.6–9.4 km) and the gold star marking the wavefield
+source x = 4.958 km.*
+
+### 4. Wavefield time progression
+
+![Wavefield time slices, 3-6 Hz, source @ x=4.958 km](figs/wavefield_time_progression.png)
+
+*Six time snapshots (0.20 → 5.00 s) from the included 3-6 Hz wavefield.
+Velocity model in grayscale (alpha 0.4) sits behind the wavefield amplitude
+(seismic-alpha cmap, transparent near zero).*
+
+### 5. Shot-gather panels (manuscript intro figure)
+
+![Shot-gather panels](figs/shot_gather_panels.png)
+
+*1×4 layout: velocity model with the three color-coded source positions on
+the left, then the three corresponding shot-gather panels (Left/Middle/Right
+= source idx 8/32/56) recorded over the 8 s simulation.*
+
 ## Quick start
 
 ```bash
@@ -59,9 +120,9 @@ cd ./preview_data
 python view_preview.py --plot all --output-dir ./figs
 ```
 
-For an inline-rendered version with all five figures, see **`view_preview.ipynb`**
-above (HuggingFace renders Jupyter notebooks with embedded outputs directly on
-the dataset page — no need to download anything to view).
+The `view_preview.ipynb` notebook in this repo also embeds all five figures
+inline — HuggingFace renders the saved outputs directly on the dataset page,
+so you can read through the visual narrative without downloading anything.
 
 ## How this sample was created