material green_transparency
{
   technique
   {
      pass
      {
         diffuse 1 1 1 1.0

         scene_blend alpha_blend
         depth_write off                                    
         cull_hardware none     
         cull_software none     
         lighting off 

         texture_unit
         {
            texture models/obstacles/markers/green_transparency.png
         }
      }
   }
}
material striped_circle
{
   technique
   {
      pass
      {
         diffuse 1 1 1 1.0

         scene_blend alpha_blend
         depth_write off                                    
         cull_hardware none     
         cull_software none     
         lighting off 

         texture_unit
         {
            texture models/obstacles/markers/striped_circle.png
         }
      }
   }
}