## Summary
- Restores `Sol-Engine/StreamRender-H3/blog-assets/showcase-20-drives.mp4` to the original 1-minute 20-scene grid from 9e055550ff (H.264, 1920x888, 24 fps, 60.4 s, no audio), replacing the 2-minute version.
- Adds the two engine-vs-render drives that the StreamRender-H3 blog shows under the showcase. Each is H.264 High, 2688x768, 24 fps, 60.4 s, with AAC audio and faststart, the engine view on the left and the streaming render on the right.
## Files
- `Sol-Engine/StreamRender-H3/blog-assets/showcase-20-drives.mp4` (copied from 9e055550ff, 39.7 MB)
- `Sol-Engine/StreamRender-H3/blog-assets/engine-vs-render-single-car.mp4` (single car on the Spring track, 48.6 MB)
- `Sol-Engine/StreamRender-H3/blog-assets/engine-vs-render-multi-car.mp4` (five rival cars at Brondehach, 60.8 MB)
