void water_set_surface( world_instance *world, f32 height );
void render_water_texture( world_instance *world, vg_camera *cam );
void render_water_surface( world_instance *world, vg_camera *cam );
void water_set_surface( world_instance *world, f32 height );
void render_water_texture( world_instance *world, vg_camera *cam );
void render_water_surface( world_instance *world, vg_camera *cam );