We use these things to make an effect of tunnel within cliff.
I provided the .akx file, SLPs and BMPs for use.
Head - Tunnel Top(4 directions were provided)
Flowers 1 - Tunnel Bottom SW
Flowers 2 - Tunnel Bottom SE
Plants - Terrain Cover(5 terrains were provided: dirt, grass, dirt-grass, sand and snow, for covering the units in the tunnel)
Statue - Mini Obstacle Object(To block the sides of the tunnel)
How to Use:
1. Draw cliffs.
2. Remove cliffs to be dug.
3. Place Obstacle Objects to set borders underground.
3. Put Tunnel Bottoms and Tops at removed cliff positions.
4. Place Terrain Covers to cover the tunnel's underground areas.
5. Play it!