I was level owner for Arena 09. Majority of Rock Assets created by the talented Matt Via (https://www.artstation.com/matthewjvia).
Geyser was my creation.
Mark Skelton - Art Director
Lighting: Michael Kahn-Rose
A 4 material blend done in Bluepoint's Engine for the areas surrounding the geysers.
Example of how the following 2 material were used together. In game rock assets were removed for demonstration purposes.