There are 3 game stages for the cannon:
PBS materials
1. Cannon: 3,048 polygons, 3,158 vertexes, 5,452 triangles.
2. Cannon damaged: 2,896 polygons, 3,005 vertexes, 5,236 triangles.
3. Cannon destroyed: 2,947 polygons, 3,051 vertexes, 5,324 triangles.
Textures are in .TIF file format. (diffuse, normals and specular) are 2048x2048 px.