I created an in-engine paintable material that allowed me to paint the ground meshes without using the terrain tool.
This material lerped 4 different texture sets using a splash texture. It is usually cheaper to lerp them using vertex colours, but in this case the quality achieved was way better with a splash texture, and I managed to keep the target FPS.
Also, the materials are blended with heightmaps, which helped me to achieve a high level of realism.
Apart from the rocks and the statues, all the props were made by me, including the particles, decals and lights.
I was also the weapon artist of this project, I modeled, textured, rigged and animated both the main pistol and the chainsaw.